Obiit is Latin for deceased and is used in genealogic abbreviations and ecclesiastical literature

Abbreviations used in Genealogy, on tombstones and in ecclesiastical literature

The words most commonly abbreviated at all times are proper names, titles (official or customary), of persons or corporations, and words of frequent occurrence. A list of those used in Roman Republican and early Imperial times may be seen in James Chidester Egbert, Jr.'s Latin Inscriptions (New York, 1896), 417-459. The Jewish scribes and Talmudic scholars also had frequent recourse to abbreviations.

Between the seventh and ninth centuries the ancient Roman system of abbreviations gave way to a more difficult one that gradually grew up in the monastic houses and in the chanceries of the new Teutonic kingdoms. Merovingian, Lombard, and Anglo-Saxon scripts offer each their own abbreviations, not to speak of the unique scotica manus or libri scottice scripti (Irish hand, or books written in the medieval Irish hand). Eventually such productive centres of technical manuscripts as the Papal Chancery, the theological schools of Paris and Oxford, and the civil-law school of Bologna set the standards of abbreviations for all Europe.

Medieval manuscripts abound in abbreviations, owing in part to the abandonment of the uncial, or quasi-uncial, and the almost universal use of the cursive, hand. The medieval writer inherited a few from Christian antiquity; others he invented or adapted, in order to save time and parchment. They are found especially in manuscripts of scholastic theology and canon law, annals and chronicles, the Roman law, and in administrative documents, civil and privileges, bulls, rescripts). They multiplied with time, and were never so numerous as on the eve of the discovery of printing; many of the early printed books offer this peculiarity, together with other characteristics of the manuscript page. The development of printing brought about the abandonment of many abbreviations, while it suggested and introduced new ones a process also favoured by the growth of ecclesiastical legislation, the creation of new offices, etc. There was less medieval abbreviation in the text of books much used on public occasions, e.g. missals, antiphonaries, bibles; in one way or another the needs of students seem to have been the chief cause of the majority of medieval abbreviations. The means of abbreviation were usually full points or dots (mostly in Roman antiquity), the semicolon (eventually conventionalized), lines (horizontal, perpendicular, oblong, wavy curves, and commas). Vowel-sounds were frequently written not after, but over, the consonants. Certain letters, like p and q, that occur with extreme. frequency, e.g. in prepositions and terminations, became the source of many peculiar abbreviations; similarly, frequently recurring words like et (and), est (is).

Habit and convenience are today the principal motives for using abbreviations. Most of those in actual use fall under one or other of the following heads: Administrative; Liturgical; Scholastic; Chronological.

The first class of abbreviations includes those used in the composition of Pontifical documents. They were once very numerous, and lists of them may be seen in the works quoted below (e.g. Quantin, Prou). It may be well to state at once that since 29 December 1878, by order of Leo XIII, the great papal documents (Litterae Apostolicae) are no longer written in the old Gothic hand known as bollatico; all abbreviations, with the exception of a few obvious ones, like S.R.E., were abolished by the same authority (Acta S. Sedis, XI, 465-467). In the transaction of ordinary business the Roman Congregations are wont to use certain brief and pithy formulas (e.g. Negative = "No"; Negative et amplius = "No with emphasis"). They are not, correctly speaking, abbreviations. For a list of these see Canon law. This class includes also the abbreviations for the names of most sees. The full Latin titles of all existing (Latin) dioceses may be seen in the Roman annual, "Gerarchia Cattolica", a complete list of the Latin names of all known dioceses (extant or extinct) is found in the large folio work of the Comte de Mas Latrie, "Trésor de chronologie, d'histoire et de géographie" (Paris, 1884). For the same purpose the reader may also consult the episcopal catalogues of the Benedictine Pius Bonifacius Gams, "Series Episcoporum Ecclesiae Catholicae" (Ratisbon, 1873-86), and the Franciscan Conrad Eubel, Hierarchia Catholica Medii Aevi (Münster, 1898-1902). Under this general heading may be included all abbreviated forms of addresses in ordinary intercourse, whether of individuals or of members of religious orders, congregations, institutes, to which may be added the forms of addresses usual for members of Catholic lay societies and the Papal orders of merit. (See CATHOLIC SOCIETIES, ORDERS OF MERIT.) The abbreviations of the titles of Roman Congregations, and of the individual canonical ecclesiastical authorities, belong also to this class.
A second class of abbreviations includes those used in the description of liturgical acts or the directions for their performance, e.g. the Holy Mass, the Divine Office (Breviary), the ecclesiastical devotions, etc. Here may also be classed the abbreviated forms for the name of God, Jesus Christ, and the Holy Ghost; also for the names of the Blessed Virgin, the saints, etc.; likewise abbreviations used in the administration of the Sacraments, mortuary epitaphs, etc. (to which class belong the numerous Catacomb inscriptions); finally some miscellaneous abbreviations like those used in the publication of documents concerning beatification and canonization.
In the third class belong scholastic abbreviations, used to designate honorific titles acquired in the schools, to avoid the repetition of lengthy titles of books and reviews, or to facilitate reference to ecclesiastical and civil legislation.
In the fourth class of abbreviations belong all such as are used to describe the elements of the year, civil or ecclesiastical.

List of abbreviations in general use

Ab. - Abbas ("Abbot")
Abp. - Archbishop
Abs. - Absens ("Absent")
A.C. - Auditor Camerae (Auditor of the Papal Treasury)
AC - Ante Christum ("Before Christ")
ACN - Ante Christum Natum ("Before the Birth of Christ")
A.D. - Anno Domini ("Year of Our Lord")
a.d. - ante diem ("The day before")
Adm. Rev. - Admodum Reverendus ("Very Reverend")
Adv. - Adventus ("Advent")
Alb. - Albus ("White" - Breviary)
al. - alii, alibi, alias ("others", "elsewhere", "otherwise")
A.M. - Anno Mundi ("Year of the World")
A.M. -- Artium Magister ("Master of Arts")
A.M.D.G. -- Ad Majorem Dei Gloriam ("For the greater glory of God")
An. -- Annus ("Year")
Ann. -- Anni ("Years")
Ana, Ant. -- Antiphon
Apost. -- Apostolus ("Apostle")
Ap. Sed. -- Apostolica Sedes ("Apostolic See")
Ap. Sed. Leg. -- Apostolicae Sedis Legatus ("Legate of the Apostolic See")
Archiep. -- Archiepiscopus ("Archbishop")
Archid. -- Archidiaconus ("Archdeacon")
Archiprb. -- Archipresbyter ("Archpriest")
A.R.S. -- Anno Reparatae Salutis ("In the year of Our Redemption")
A.U. -- Alma Urbs ("Beloved City" -- i.e., Rome)
Authen. -- Authentica ("Authentic" -- e.g. letters)
Aux. -- Auxilium, Auxilio ("Help", "With the help of")
B.A. -- Baccalaureus Artium ("Bachelor of Arts")
B. BB. -- Beatus, Beati ("Blessed")
B.C. -- Before Christ
B.C.L. -- Baccalaureus Civilis [or Canonicae] Legis ("Bachelor of Civil [or Canon] Law")
B.D. -- Bachelor of Divinity
B.F. -- Bona Fide ("In Good Faith")
Ben. -- Benedictio ("Blessing")
Benevol. -- Benevolentia ("Benevolence")
Bon. Mem. -- Bonae Memoriae ("Of Happy Memory")
B.P. -- Beatissime Pater ("Most Holy Father")
Bro. -- Brother
B. Se. -- Baccalaureus Scientiarum ("Bachelor of Sciences")
B.U.J. -- Baccalaureus Utriusque Juris ("Bachelor of Both Laws" -- i.e., civil and canon)
B.T. -- Baccalaureus Theologiae ("Bachelor of Theology")
B.V. -- Beatitudo Vestra ("Your Holiness")
B.V. -- Beata Virgo ("Blessed Virgin")
B.V.M. -- Beata Virgo Maria ("Blessed Virgin Mary")
Cam. -- Camera (Papal Treasury)
Cam. Ap. -- Camera Apostolica ("Apostolic Camera" -- i.e. Papal Treasury)
Can. -- Canonicus
Canc. -- Cancellarius ("Chancellor")
Cap. -- Capitulum ("Little Chapter" -- Breviary)
Cap. de seq. -- Capitulum de Sequenti ("Little chapter of the following feast" -- Breviary)
Capel. -- Capella ("Chapel")
Caus. -- Causa ("Cause")
C.C. -- Curatus ("Curate" -- used chiefly in Ireland)
CC. VV. -- Clarissimi Viri ("Illustrious Men")
Cen. Eccl. -- Censura Ecclesiastica ("Ecclesiastical Censure")
Cla. -- Clausula ("Clause")
Cl., Clico. -- Clericus, Clerico ("Cleric")
Clun. -- Cluniacenses ("Monks of Cluny")
C.M. -- Causa Mortis ("On occasion of death")
Cod. -- Codex (Manuscript)
Cog. Leg. -- Cognatio Legalis ("Legal Cognation")
Cog. Spir. -- Cognatio Spiritualis ("Spiritual Cognation")
Coll. Cone. -- Collectio Conciliorum ("Collection of the Councils")
Comm. Prec. -- Commemoratio Praecedentis ("Commemoration of the preceding feast" -- Breviary)
Comm. Seq. -- Commemoratio Sequentis ("Commemoration of the following feast" -- Breviary)
Compl. -- Completorium ("Compline" -- Breviary)
Con. -- Contra ("against")
Cone. -- Concilium ("Council")
Conf. -- Confessor
Conf. Doct. -- Confessor et Doctor (Breviary)
Conf. Pont. -- Confessor Pontifex ("Confessor and Bishop" -- Breviary)
Cons. -- Consecratio ("Consecration")
Consecr. -- Consecratus ("Consecrated")
Const. Ap. -- Constitutio Apostolica ("Apostolic Constitution")
Cr. -- Credo ("Creed" -- Breviary)
D. -- Dominus ("Lord")
d. -- dies ("day")
D.C.L. -- Doctor Civilis [or Canonicae] Legis ("Doctor of Civil [or Canon] Law")
D.D. -- Doctores ("Doctors")
D.D. -- Donum dedit; Dedicavit ("Gave", "dedicated")
D.D. -- Doctor Divinitatis ("Doctor of Divinity" -- i.e. Theology)
Dec. -- Decanus ("Dean")
Def. -- Defunctus ("Deceased")
D.G. -- Dei Gratia ("By the Grace of God")
D.N. -- Dominus Noster ("Our Lord")
D.N.J.C. -- Dominus Noster Jesus Christus ("Our Lord Jesus Christ")
DN, DNS, DNUS -- Dominus ("Lord")
Doct. -- Doctor (Breviary)
Dom. -- Dominica ("Sunday")
D.O.M. -- Deo Optimo Maximo ("To God, the Best and Greatest")
Doxol. -- Doxologia ("Doxology" -- Breviary)
D.R. -- Decanus Ruralis ("Rural Dean")
DS -- Deus ("God")
D.Se. -- Doctor Scientiarum ("Doctor of Sciences")
D.V. -- Deo Volente ("God willing")
Dupl. -- Duplex ("Double feast" -- Breviary)
Dupl. Maj. -- Duplex Major ("Double Major feast")
Dupl. I. Cl. -- Duplex Primae Classis ("Double First Class feast" -- Breviary)
Dupl. II. Cl. -- Duplex Secundae Classis ("Double Second Class feast" -- Breviary)
Eccl. -- Ecclesiasticus ("Ecclesiastic")
E., Eccl. -- Ecclesia ("The Church")
El. -- Electio, Electus ("Election", "Elect")
Emus -- Eminentissimus ("Most Eminent")
EPS, EP., Episc. -- Episcopus ("Bishop")
Et. -- Etiam ("Also, Even")
Evang. -- Evangelium ("Gospel" -- Breviary)
Ex. -- Extra ("Outside of")
Exe. -- Excommunicatus, Excommunicatio ("Excommunicated, Excommunication")
Fel. Mem. -- Felicis Memoriae ("Of Happy Memory")
Fel. Rec. -- Felicis Recordationis ("Of Happy Memory")
Fer. -- Feria ("Weekday")
Fr., F. -- Frater, Frere ("Brother")
Fund. -- Fundatio ("Foundation")
Gen. -- Generalis ("General")
Gl. -- Gloria ("Glory to God", etc.)
Gr. -- Gratia ("Grace")
Grad. -- Gradus ("Grade")
Grat. -- Gratias ("Thanks"); or Gratis ("Without expense")
hebd. -- Hebdomada ("Week")
Hom. -- Homilia ("Homily" -- Breviary)
hor. -- hora ("hour")
IC -- Jesus (first and third letters of His name in Greek)
Id. -- Idus ("Ides")
Igr. -- Igitur ("Therefore")
I.H.S. -- Iesus Hominum Salvator ("Jesus Saviour of Men" -- usual interpretation). Really a faulty Latin transliteration of the first three letters of *JESUS in Greek (IHS for IHC).
Ind. -- Indictio ("Indiction")
Ind. -- Index
Inq. -- Inquisitio ("Inquisition")
i.p.i. -- in partibus infidelium ("among the infidels")
Is. -- Idus ("Ides")
J.C. -- Jesus Christus ("Jesus Christ")
J.C.D. -- Juris Canonici Doctor, Juris Civilis Doctor ("Doctor of Canon Law", "Doctor of Civil Law")
J.D. -- Juris Doctor ("Doctor of Law")
J.M.J. -- Jesus, Maria, Joseph ("Jesus, Mary, Joseph")
Jo., Joann. -- Joannes ("John")
J.U.D. -- Juris Utriusque Doctor ("Doctor of Both Laws" -- Civil and Canon)
Jud. -- Judicium ("Judgment")
J.U.L. -- Juris Utriusque Licentiatus ("Licentiate of Both Laws")
Jur. -- Juris ("Of Law")
Kal. -- Kalendae ("Calends")
Laic. -- Laicus ("Layman")
Laud. -- Laudes ("Lauds" -- Breviary)
L.C.D. -- Legis Civilis Doctor ("Doctor of Civil Law")
l.c.; loc. cit. -- Loco citato ("at the place already cited")
Lect. -- Lectio ("Lesson")
Legit. -- Legitime, Legitimus ("Legally", "legitimate")
L.H.D. -- Litterarum Humaniorum Doctor ("Doctor of Literature")
Lib., Lo. -- Liber, Libro ("Book", "In the book")
Lic. -- Licentia, Licentiatus ("License", "Licentiate")
Litt. -- Littera ("Letter")
LL.B. -- Legum Baccalaureus ("Bachelor of Laws")
LL.D. -- Legum Doctor ("Doctor of Laws")
LL.M. -- Legum Magister ("Master of Laws")
Loc. -- Locus ("Place")
Lov. -- Lovanium ("Louvain")
Lovan. -- Lovanienses (Theologians of Louvain)
L.S. -- Loco Sigilli ("Place of the Seal")
Lud. -- Ludovicus
M. -- Maria ("Mary")
M.A. -- Magister Artium ("Master of Arts")
Mag. -- Magister ("Master")
Mand. -- Mandamus ("We command")
Mand. Ap. -- Mandatum Apostolicum ("Apostolic Mandate", e.g. for a bishop's consecration)
Mart., M., MM. -- Martyr, Martyres ("Martyr", "Martyrs" -- Breviary)
Mat. -- Matutinum ("Matins" -- Breviary)
Matr. -- Matrimonum ("Marriage")
Mgr., Msgr., or Mons. -- Monsignor ("My Lord")
Miss. -- Missa ("Mass" -- Breviary); Missionarius ("Missionary")
Miss. Apost., M.A. -- Missionarius Apostolicus ("Missionary Apostolic")
M.R. -- Missionarius Rector ("Missionary Rector")
m.t.v. -- mutatur terminatio versiculi ("the termination of the little verse is changed" -- Breviary)
Nativ. D.N.J.C. -- Nativitas Domini Nostri Jesu Christi ("Nativity of Our Lord Jesus Christ")
N. D. -- Nostra Domina, Notre Dame ("Our Lady")
Nigr. -- Niger ("Black" -- Breviary)
No. -- Nobis ("to us", "for us")
Nob. -- Nobilis, Nobiles ("Noble", "Nobles")
Noct. -- Nocturnum ("Nocturn")
Non. -- Nonae ("Nones")
Nostr. -- Noster, nostri ("Our", "of our")
Not. -- Notitia ("Knowledge")
N.S. -- Notre Seigneur, Nostro Signore ("Our Lord")
N.S. -- New Style
N.T. -- Novum Testamentum ("New Testament")
Ntri. -- Nostri ("Of our")
Nup. -- Nuptiae ("Nuptials")
Ob. -- Obiit ("Died")
Oct. -- Octava ("Octave" -- Breviary)
Omn. -- Omnes, Omnibus ("All", "to all")
Op. Cit. -- Opere Citato ("In the work cited")
Or. -- Oratio ("Prayer" -- Breviary)
Ord. -- Ordo, Ordinatio, Ordinarius ("Order", "Ordination", "Ordinary")
Or. Orat. -- Orator ("Petitioner"), Oratorium ("Oratory")
O.S. -- Old Style
O.T. -- Old Testament
Oxon. -- Oxonium, Oxonienses ("Oxford", "Theologians or Scholars of Oxford")
P. -- Pater, Pere ("Father")
Pa. -- Papa ("Pope"); Pater ("Father")
Pact. -- Pactum ("Agreement")
Pasch. -- Pascha ("Easter" -- Breviary)
Patr. -- Patriarcha ("Patriarch")
Pent. -- Pentecostes ("Pentecost" -- Breviary)
Ph. B. -- Philosophiae Baccalaureus ("Bachelor of Philosophy")
Ph.D. -- Philosophiae Doctor ("Doctor of Philosophy")
Phil. -- Philosophia ("Philosophy")
Ph. M. -- Philosophiae Magister ("Master of Philosophy")
P.K. -- Pridie Kalendas ("The day before the Calends")
Poenit. -- Poenitentia ("Penance")
Poenit. Ap. -- Poenitentiaria Apostolica ("Office of the Apostolic Penitentiary")
Pont. -- Pontifex ("Pontiff", i.e. Bishop -- Breviary)
Pont. -- Pontificatus ("Pontificate")
Pont. Max. -- Pontifex Maximus ("Supreme Pontiff")
Poss. -- Possessor, Possessio ("Possessor", "Possession")
PP. -- Papa ("Pope"); Pontificum ("Of the popes")
P.P. -- Parochus ("Parish Priest" -- used mostly in Ireland)
PP. AA. -- Patres Amplissimi ("Cardinals")
P.P.P. -- Propria Pecunia Posuit ("Erected at his own expense")
P.R. -- Permanens Rector ("Permanent Rector")
Praef. -- Praefatio ("Preface" of the Mass -- Breviary)
Presbit. -- Presbyter, Priest
Prof. -- Professus, Professio, Professor ("Professed", "Profession", "Professor")
Prop. Fid. -- Propaganda Fide (Congregation of the Propaganda, Rome)
Propr. -- Proprium ("Proper" -- Breviary)
Prov. -- Provisio, Provisum ("Provision", "Provided")
Ps. -- Psalmus ("Psalm")
Pub., Publ. -- Publicus, Publice ("Public", "Publicly")
Purg. Can. -- Purgatio Canonica ("Canonical Disculpation")
Quadrag. -- Quadragesima ("Lent", also the "Fortieth day" before Easter -- Breviary)
Quinquag. -- Quinquagesima (The "Fiftieth day" before Easter -- Breviary)
R. -- Responsorium ("Responsory" -- Breviary)
R. -- Roma (Rome)
Rescr. -- Rescriptum ("Rescript")
R.D. -- Rural Dean
Req. -- Requiescat ("May he [or she] rest", i.e. in peace)
Resp. -- Responsum ("Reply")
R.I.P. -- Requiescat In Pace ("May he or she rest in peace")
Rit. -- Ritus ("Rite", "Rites")
Rom. -- Romanus, Romana ("Roman")
R. P. -- Reverendus Pater, Reverend Pere ("Reverend Father")
RR. -- Rerum ("Of Things, Subjects" -- e.g. SS. RR. Ital., Writers on Italian [historical] subjects); Regesta
Rt. Rev. -- Right Reverend
Rub. -- Ruber ("Red" -- Breviary)
Rubr. -- Rubrica ("Rubric")
S., Sacr. -- Sacrum ("Sacred")
Sab., Sabb. -- Sabbatum ("Sabbath", Saturday)
Saec. -- Saeculum (Century)
Sal. -- Salus, Salutis ("Salvation", "of Salvation")
Salmant. -- Salmanticenses (Theologians of Salamanca)
S.C. -- Sacra Congregatio ("Sacred Congregation")
S.C.C. -- Sacra Congregatio Concilii ("Sacred Congregation of the Council", i.e. of Trent)
S.C.EE.RR. -- Sacra Congregatio Episcoporum et Regularium ("Sacred Congregation of Bishops and Regulars")
S.C.I. -- Sacra Congregatio Indicis ("Sacred Congregation of the Index")
S.C.P.F. -- Sacra Congregatio de Propaganda Fide ("Sacred Congregation for the Propagation of the Faith")
SCS -- Sanctus ("Saint")
s.d. -- sine datâ (undated book)
S.D. -- Servus Dei (Servant of God)
Semid. -- Semiduplex ("Semi" double feast -- Breviary)
Septuag -- Septuagesima ("Seventieth day" before Easter; always a Sunday -- Breviary)
Sexag. -- Sexagesima ("Sixtieth day" before Easter -- Breviary)
Sig. -- Sigillum ("Seal")
Simpl. -- Simplex ("Simple" feast -- Breviary)
Sine Com. -- Sine Commemoratione ("Without commemoration" of other feast, or feasts -- Breviary)
s.l. -- sine loco ("without indication" of place of printing)
s.l.n.d. -- sine loco nec data ("without indication of place" or "without date of printing")
S.M. -- Sanctae Memoriae ("Of Holy Memory")
Soc. -- Socius, Socii ("Companion", "Companions" -- Breviary)
S. Off. -- Sanctum Officium (Congregation of the Holy Office, Inquisition)
S.P. -- Sanctissime Pater ("Most Holy Father")
S.P., S. Petr. -- Sanctus Petrus ("St. Peter")
S.P. -- Summus Pontifex ("Supreme Pontiff", Pope)
S.P.A. -- Sacrum Palatium Apostolicum ("Sacred Apostolic Palace", Vatican, Quirinal)
Sr. -- Sister
S.R.C. -- Sacra Rituum Congregatio ("Sacred Congregation of Rites")
S.R.E. -- Sancta Romana Ecclesia, Sanctae Romanae Ecclesia ("Most Holy Roman Church"; or, "of the Most Holy Roman Church")
SS. -- Scriptores ("Writers")
SS.D.N. -- Sanctissimus Dominus Noster ("Our Most Holy Lord [Jesus Christ]", also a title of the Pope)
S., SS. -- Sanctus, Sancti ("Saint", "Saints")
S.T.B. -- Sacrae Theologiae Baccalaureus ("Bachelor of Sacred Theology")
S.T.D. -- Sacrae Theologiae Doctor ("Doctor of Sacred Theology")
S.T.L. -- Sacrae Theologiae Licentiatus ("Licentiate of Sacred Theology")
S.T.P. -- Sanctae Theologiae Professor ("Professor of Sacred Theology")
Suffr. -- Suffragia ("Suffrages" -- i.e. prayers of the saints; Breviary)
S.V. -- Sanctitas Vestra ("Your Holiness")
Syn. -- Synodus ("Synod")
Temp. -- Tempus, Tempore ("Time", "in time")
Test. -- Testes, Testimonium ("Witnesses", "Testimony")
Theol. -- Theologia ("Theology")
Tit. -- Titulus, Tituli ("Title", "Titles")
Ult. -- Ultimo ("Last" -- day, month, year)
Usq. -- Usque ("As far as")
Ux. -- Uxor ("Wife")
V., Ven., VV. -- Venerabilis, Venerabiles ("Venerable")
V., Vest. -- Vester ("Your")
Vac. -- Vacat, Vacans ("Vacant")
Val. -- Valor ("Value")
Vat. -- Vaticanus ("Vatican")
Vba. -- Verba ("Words")
Vers. -- Versiculus ("Versicle" -- Breviary)
Vesp. -- Vesperae ("Vespers" -- Breviary)
V.F., Vic. For. -- Vicarius Foraneus ("Vicar-Forane")
V.G. -- Vicarius Generalis ("Vicar-General")
Vid. -- Vidua ("Widow" -- Breviary)
Vid., Videl. -- Videlicet ("Namely")
Vig. -- Vigilia ("Vigil" of a feast -- Breviary)
Viol. -- Violaceus ("Violet" -- Breviary)
Virg. -- Virgo ("Virgin" -- Breviary)
Virid. -- Viridis ("Green" -- Breviary)
V.M. -- Vir Magnificus ("Great Man")
V. Rev. -- Very Reverend
V.T. -- Vetus Testamentum
XC., XCS. -- Christus ("Christ" -- first, middle, and last letters of the Greek name)