In
Norse mythology,
Surt was a giant who ruled
Muspel, the realm of fire and was married to
Sinmore. He had a fiery sword which shined more brightly than the sun. During
Ragnarok, he will destroy the entire world except
Hodmimir's Forest, because that is the only thing his sword can not destroy. He will kill the unarmed god
Freyr as well.
Alternative: Surtr
Surtsey is an island named for Surt.