A male name in Wales, Gwyn has been mostly feminine in the US thanks to its resemblance to the more familiar Gwen. It derives from the same Celtic root as the popular Finn family of names.

Short, simple, gentle, undeniably Welsh but easy to spell and pronounce – there's a lot to like about this underused gem. In the States it's been almost exclusively female, perhaps due to the greater familiarity of Gwen, but it definitely feels like a candidate to reclaim for the boys.