I like it a quite a bit, too. I don't know about the nn
Marty... I dislike it, too, so I wouldn't use it. I don't really think people wold automatically use it, and you could always correct them if they did.
I personally like it because of
Martin the Warrior, a key character in
Brian Jacques' Redwall series. Because of this, I would probably use it in a sibset with
Luke,
Matthias and/or
Mariel (other Redwall characters with usable names).