Fenrys is a boy's name of Norse origin, meaning "marsh" or "fen." Coming from the mythological name Fenrir, it's a wonderful way to commemorate your newest addition's Norse heritage. In Norse legend, Fenrir was a wolf so monstrous that only a magical chain could hold him down. Other versions of the tale say this formidable beast will eventually break from its bonds and devour the sun. But until then, may the name your fearless Fenrys carries remind them that they're just as much a force to be reckoned with.