Dogmatix

Dogmatix is a fictional character, a tiny white dog who belongs to Obelix in the Asterix comics. Dogmatix is a pun on the words dog and dogmatic. In the original French his name is Idéfix, itself a pun on the French expression idée fixe (fixed idea) meaning an obsession. This pun is unusual for a translation in that it is remarkably close to the original meaning and adds to it (by inclusion of the dog- syllable).