Jeopardy Question

[Liz S.]

I was watching Jeopardy a few weeks back, and a question popped up. 
It said something like, "His first name is Lucius, and he is currently
incarcerated in Azkaban Prison."  Nobody rang in, and Alex said, "He's
in Harry Potter world.  His surname is 'Mulfay' (something like that).
 Oh, Malfoy.  What an unusual name."  And I was like "Trebek is so
common?"  Anyway...I was very surprised nobody got the right... :-(