In the books, it’s easiest to infer that the Dumbledore line ended with Albus and Aberforth.
I think it is also difficult to say that the Dumbledores were an ancient wizarding family. After all, Percival married a Muggle-born so he can’t have been very pureblood leaning. If the extended Dumbledore family was, it is most likely they became extinct in the male line other than Percival.
Book 7, which is heavy on Dumbledore lore, speaks as if Albus’s nuclear family was the only Dumbledore family. We pretty much know Albus didn’t have kids so that’s the end of that line. As for Aberforth, I don’t think he’s the type to go around getting girls pregnant. Especially since it’s implied in the books he was a goatfu- uh, he preferred to devote his life on research and experiment on goats. I think from his lifestyle, he was probably asexual but that’s just me assuming.
In the FB movies, Aberforth has a kid so I guess that’s not the end of the line. I don’t know if Credence dies tho cuz I deleted those movies from my head. Nothing in those movies counts as canon information, even if Jo wrote it. Seeing as she changed McGonagall’s age by thirty to fifty years.