Prænomen
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Lat. Forename or first name. The first of the three names by which the Romans were commonly distinguished. It marked the individual, and was commonly written with one letter; as "A." for "Aulus ;" "C." for "Cains," etc.
Adams, Roin. Ant. 35.