[brazzy]

That's not at all how it worked.

"The fifth slave I bought" and "the fifth son of this super rich senator" would have exactly the same name, Quintus.

[Pigalowda]

Cicero’s less famous brother was named Quintus.

Pompey Magnus had a son, Sextus (6th), that was relatively famous for his opposition to Octavius.

[memling]

Not sure precisely why you're being downvoted for bringing some additional light to the conversation. Been busy here but appreciate the insights; this isn't my field. Are there good sources that clarify the complexities of Roman naming conventions?