lmao this is my favorite thing

I never brought him to the new board, but Stephen Flint and Edric would have been a year apart in the same house. It's part of the reason I never brought Stephen over, actually!

Bella Scrimgeour & @"Helga Scamander" were year-mates. Bella was also a year above Handsome Whitledge, and given his prefect status, she probably knew him at least in passing.

Dionisia Fisk was a year above Helga, too, but they definitely ran in different social circles, not to mention that Dionisia dropped out after her OWL examinations.

Finnian Byrne (who is older than Mathias Beaumont, which I always find amusing) was a year above Edward Macmillan, but they also were in different houses and different social circles. Albert Pettigrew was a year below Edward, and probably knew him. Jossima Warbeck is a few years younger than Finnian, but I'd bet you anything they'd have gotten along!

My students' connections are much more obvious—they even acknowledge each other's existence if they share a quidditch team or class.

Family-wise, though, Frida Lestrange and Albert Pettigrew share a cousin through Arthur Pettigrew. I always forget that Frida and Art are first cousins and it never ceases to amuse me.

Eldin Bones and Flora Mulciber are first cousins through their Longbottom mothers, too :P