Xanatos has a strained relationship with his dad. We know jack shit about Xanatos's mom, so it's safe to assume that he was raised mostly by his dad. His dad really disapproves of his lifestyle and feels that money is all that Xanatos cares about. Xanatos has a bit of a dad complex, as shown by him inviting his father to his wedding and basically going 'hey dad hey dad hey dad look at me look at what I did, don't you like me dad?'. Needless to say, Xanatos and his father probably don't talk that much/at all.

Klarion's dad is missing in action. c: He went above to Blue Rafters and ~vanished~. So, Klarion was raised mostly by his mom and sister. His dad also may or may not be Ebeneezer Badde aka the guy who Klarion killed by a horde of subway children. Oh comics.