The name Corentin is a boy's name of French origin meaning "tempest, hurricane". Corentin and is often added to lists like Unique Baby Names: Unusual and Rare and discussed in our forums with posts like "Names on NB that make you go WOW!".
From the experts:
Corentin is an intriguing saint's name fashionable in France but virtually unknown here-- which you may consider a big plus. St. Corentin possessed a magical fish that regenerated itself each night, feeding himself and his lucky visitors in perpetuity.