Jesus that’s far more random than a Devils-Rangers family split
My boys had no choice but to be Devils fans - there was no chance that wasn't happening. Been taking them to games since they were young and they're all-in.
I grew up a die-hard Mets fan as a kid - watching the Mets playoffs in '86 and going to the ticker-tape parade are some of my earliest memories, though I also lost quite a bit of interest in MLB overall since then. My wife's family is all Yankee fans and more into baseball in general. Wasn't hard to see which path would serve them better in life.
So both boys were basically Yankee fans from a young age, but a few years back (before the Braves won the World Series in 2021 to his credit), my older son wanted to be different than his friends and decided to become a Braves fan. He chose Atlanta in part because we have family down there (though my brother-in-law that lives there is a huge Yankee fan) and maybe he liked the logo or something. Regardless, that's his team - Acuna's his favorite player and we took him out to a Mets-Braves game for one of his recent birthdays.
Was happy that he at least got to see them win a World Series, as none of the local teams have won jack in his lifetime that he'd remember (he was 3 1/2 when the Giants won in 2012).