Both sound correct to me. And I found evidence for both via google search.
Wynn: This name is variously translated as Welsh for “fair” or “white,” or Old English, meaning “friend.” It's often considered a girls' name, but it's another one with good crossover potential thanks to developer/entrepreneur Steve Wynn.
The names are separated into girl's names and boy's names.
I know that google search cannot prove anything, we still need some native speakers here to have a vote.