User blog comment:DancePowderer/Where There's Vinsmoke, There's Power/@comment-4493594-20160122110849

Sounds like they are more of a mafia than an actual family. Bege also kind of fits that theme, so who knows. But I do not doubt they are an actual family if your theory is correct and they are really old enough for Brook to have heard about them.

Now with Charlotte on the other hand... 35 seems like a too ridiculous number of daughters. Even considering possible twins, triplets and whatnot. Either Big Mom is REALLY old, or Purin is a child. OR a considerable number of her "daughters" is adopted into the family in a Donquixote Pirates kind of way.