Who's first?

Black family tree at Leaky - I wonder who's going to be the first to use the info in a fic?

I know I'm going to have to revise my Omniocular challenge fic, because I had headmaster Phineas Nigellus allowing the compiler of Nature's Nobility to use the Hogwarts records in 1850. Since according to this he was born in 1847, that's unlikely, even he if was an infant prodigy ...

On your marks, get set, go! :D