I have 2 Viking swords, 2 daggers and a Scranasax/Seaax, and all are named.. The Vikings named all their weapons and usually dedicated them to the God of war Twi, but some were dedicated to Thor and of course Odin/Odinn.. My swords are Leg-Biter and Brain-Biter, I also have their names in Runes on my swords and I got the correct Runes from a Runemaster in England.. So I could go back in time with my weapons and a Viking warrior from let's say 1,300 years ago could read the Runes and know the names of my swords..
I don't know what sword you have as you have not said, but here are some names..
Now you know the theme, you could come up with your own unique name !!