Has it ever been used as a name? I can't see it as one, since I took French for years and know it's the word for January. I've heard of people named January and I feel the same way about it.
Avril doesn't work on a boy, in my opinion. It may be because I don't care for the idea of "reclaiming" most male names that have become female, but also because of the obvious association with Avril Lavigne and a much less obvious one - Anne's novel "Averil's Atonement" in Anne of Green Gables (I loved those books as a kid). :)