postumus

postŭmus, a, um, sup., v. posterus, III. B.

postumus
postumus (posthu-) adj. sup. posterus.— Only of children, last, latest-born, late-...

An Elementary Latin Dictionary
Postumus
Postŭmus, i, m., a Roman surname. I M. Curtius Postumus, a friend of Cicero , and the accuser of ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.