Interesting take. Wth the exception of Blaise Zabini's dad, you had the fathers of DM, TN, GG, and VC be schoolmates, Housemates, and in the same year level as their respective sons ended up being. Except for being sorted into Slytherin (just as most Blacks were), Andromeda sounds like the female equivalent of her cousin, Sirius, in that both care little for the other Slytherins. However, Sirius and Lucius share the tendency to prank (to the point of bullying) schoolmates they didn't care for.