I wonder what kind of abilities that family has.
Don Chinjou who is number 12 reminds me of a silverback gorilla. It'd be cool if he ended up being a silverback-zoan.
Xai who is number 13 reminds me of a different type of monkey, also, he's got a Don Craig look going about him as well.
Then there's Buu, who doesn't have a number but he's got a tattoo of what looks like a set of 5 claws wrapped around a skull. One of his hands look very ominous. The black hand very well could be a haki embued hand that looks like it's the reason behind his tattoo on his shoulder. Almost as if to say, if he claws you with that hand, it'll spell death.
Just a few loose observations is all.