What is the Latin word for librarian?

The usual Latin words for “librarian” are praeficiō, bibliothēcārius. The right choice depends on the sense; see the distinctions below.

English → Latin

“librarian” in Latin

praeficiōto place in command, put in charge bibliothēcāriuslibrarian

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

librarian

bibliothecae custos or praefectus; qui bibliothecae praeest; bibliothecarius (Aurelius, ap. Frontin. ad M. Caes., 4, 5); qui supra bibliothecam est (Vitr., 7, praef. 5); a bibliothecae (Inscript.). To be a librarian, bibliothecae praeesse; supra bibliothecam esse: to be anyone’s librarian, bibliothecam alicujus tractare; esse a bibliotheca alicujus (Inscript.): the office of a librarian, bibliothecae cura.

Quick answer

What is the Latin word for librarian?: The usual Latin words for “librarian” are praeficiō, bibliothēcārius. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.