I know this thread started several years ago, but I found it fascinating.
I'm an AXO
Husband Sigma Nu
Son- at a college with no Frats, but he plays a college sport which is sorta like a frat

DD- still in HS, but hoping to go Greek- One of her college requirements is a strong Greek system among other things.
My Dad: Kappa Sigma
My Cousin: Theta
SIL: Kappa
2 Nieces Sigma Kappa's
None of my siblings went Greek