Teeny, tiny spoiler for Deathly Hallows

The name of the teacher of Muggle Studies, revealed early on in the book, is Burbage -- the same last name, with a different spelling.  The owner of The Theatre, James Burbage, and his son the tragedian Richard Burbage spelled their last name both ways on the surviving documents.

(Burbridge, also common, is not the same.  Both -bage and -bidge derive from an Anglo-Saxon word cognate with the German bach, stream.)