Board Thread:General Discussion/@comment-80.44.114.235-20130830134916/@comment-4564061-20141229113259

This may be too obvious but, could it be as the article states?

"When the sword is in the inventory alongside another Skyforge Steel Sword, it will be renamed Skyforge Steel Sword. However, when alone in the inventory, it will become Vilkas's Sword again."

Try selling or dropping one of the Skyforge Steel Swords and see if its name changes.