Reading an interview of Christopher Tolkien which appeared in le Monde last month.
French readers, it seems, meet Bilbo and Frodo Baggins only if they read the original texts. If they read in translation, they get Frodon Sacquet, Bilbon Sacquet. The French title of The Hobbit, though, is apparently Bilbo le Hobbit, so I'm confused.
(There is an English translation of the interview here.)