Think we had something along these lines on the old board, where I had a few more offenders. I try not to have much overlap but I do tend to collect men in their early thirties, which means Thom Pettigrew, Lupus Jameshill and J. Alfred Darrow were all within a year of each other at school. They move in vastly different social circles now, though, so it's not much of a problem.

Ophelia Devine and Tiberius Lestrange were in the same year before the retcon that aged Tib up a few years, which is one of the weirder ones.