In "The Deathly Hallows", the Death Eaters were able to track down people who said You-Know-Who's name aloud - they have tracked Harry Potter and co after they escaped the wedding because of Harry's use of "Voldemort".
But were there any other people who were tracked the same way? I don't recall anyone other than Dumbledore and Harry Potter saying the name in the first place, and of course Dumbledore wasn't in the position to say the name by then.
P.S. This is related to my other Q, " At which point did Death Eaters start being able to track people who say you-know-who's name? "