IPA: //ˈpreɪnəˌmɛn//
KK: /ˈprēˌnōmən/
A first name, especially in the context of ancient Rome, where it was one of the three names typically given to a male citizen.
In ancient Rome, a praenomen was often used to distinguish individuals, such as Gaius in Gaius Julius Caesar.
Praenomen → It is formed from "prae-" (meaning before) and "nomen" (meaning name). The word "praenomen" refers to a personal name given before the family name in Roman naming conventions.
Think of a name that comes 'before' ('prae-') the family name — that's what a praenomen is.