Board Thread:General Discussion/@comment-11276487-20130724234237/@comment-13446185-20130808001947

Ysmir is one of Talos names as the divine Talos is made of two people given the title Ysmir, Tiber Septim and Ysmir Wulfharth.

You are partially right about the whole Ysmir being considered a god though. I just found something that says he was for sometime considered a divine being in the Nordic pantheon, but this being was in fact Ysmir Wulfharth (Underking).