I'm a trans guy and I chose Martyn as my name because I really like it and prefer how it looks spelt with a Y. It also sounds like it's supposed to be spelt with a Y rather than an I to me, although I'm not sure why I get this impression.
Martyn Littlewood is a British Minecraft/Fortnight Youtuber and variety twitch streamer (InTheLittleWood). He is also a member of the YOGSCAST group, and has previously hosted a radio show called The Wengles.