As far as I'm conserned, Bowser's only kids are the seven koopalings: Larry, Morton, Wendy, Iggy, Roy, Lemmy, and Ludwig. Why on earth Nintendo has neglected these characters in favor of Mini-Bowsers, Baby Bowsers, and -ugh- Bowser Jr. is beyond me. The koopalings were so much more creative, and way more unique. They actually had REAL personalities! Anyone who's watched the Mario cartoons has to remember those guys... they were pretty funny! And I'm not even a koopa-fan! I know however, that some of the newer "members" of Bowser's family are simply a disgrace to Bowser's real kids... Almost makes you feel sorry for 'em...
Well, that's MY two cents, anyway.
-Atticus