I don't know about Ancient Romans, but I do know a few Italian men with numbered names. In particular a Decimo (tenth), who was indeed the tenth (and I wouldn't swear the last).
They are all, unsurprisingly, old :)
They are all, unsurprisingly, old :)
Male: Sextus, Septimus, Octavius, Nonus.
Female: Prima, Secunda, Tertia, Quarta, Quinta, Sexta, Octavia, Nona, and Decima
But on further investigation the males seem to actually be named after months https://www.reddit.com/r/AskHistorians/comments/zshd6h/when_...
and the women are unclear https://en.wikipedia.org/wiki/Praenomen