Indeed, King Wulfharth was also called Ysmir.  It gets a little convoluted as the theory I subscribe to goes along the lines that "Talos" was actually three entities that became an oversoul and aescended.  King Wulfharth also happens to be one of these 3 separate entities.  So "Talos" who was Hjalti Early-Beard with King Wulfharth as an Ash Spirit/Cloud of Dust that surrounded Hjalti was labeled Ysmir but King Wulfharth was also labeled Ysmir well before Hjalti Early-Beard ever existed.

Sources:

Wulfharth - http://www.uesp.net/wiki/Lore:Wulfharth

Oversoul - http://www.uesp.net/wiki/Lore:The_Arcturian_Heresy