Board Thread:Lore Discussion/@comment-209.188.60.229-20140811024046/@comment-128.227.202.156-20140918044833

Tiber was either a Nord or a Breton, depending on who you ask (I vote Nord), but he took an Imperial wife, as did his son. The Septim line actually had quite a few different races in it: mostly Imperials, but also a few Bretons, some Nords, a Redguard here and there, even a dark elf (Katariah) at one point. In the end, it can be said that Martin Septim is "mostly" Imperial.