@Adamxero
Again she literally doesn't fucking know. She was just a baby when she and her mom were kicked out of Marijoa.
Kuma doesn't know who her bio dad, neither does the rest of the Revs. Bonney grew up with Kuma and probably thought that he was her bio dad, she has no idea who her actual bio dad is.
Bonney didn't find out the truth about the whole thing with Kuma until she entered that memory bubble of Kuma.
And do you know why she knows Saturn was the one who ordered Kuma to have his memories erased? Because she found that out through the memory bubble.
Did you forget about that whole scene? Where she entered Kuma's memory bubble.
Before she entered that memory bubble, she didn't know anything.
After entering that memory bubble, that's where she learned the truth.
Rowald being there doesn't mean jack shit, the only reason why Oda has so far only focused on them originally was because he has yet to introduce the other CDs during that time such as the God's Knights.
Rowald and his family are not the only CDs, there are many other CDs as well.
Don't think that he and his family are the only and main CDs.
If Oda is going to built up some sort of villain for Bonney to face by the end of the series, it makes sense for it to be a God's Knight who is not only a CD but also a fighter.
(If Oda does decide to have Bonney participate in the final war.)
Either way, your whole Rowald theory just makes no sense and it just feels too random.