I made a Breton spell-sword last night. I try to give Bretons Welsh sounding names (generally stemming from my love of the Prydain Chronicles). I accidentally stumbled on a real name. I named him Merwynn, kind of going for something close but not too close to Merlin. I just looked it up and found that it was a name of some Welsh king. Means "friend of the sea". Pretty happy with this one.