Board Thread:Warhammer 40k General Discussion/@comment-174.29.167.53-20140528015653/@comment-25177957-20150420222008

Like you said though, he was given a birth name, although it is not 40k canon, we could look through ancient anatolian mythology to perhaps be given a clue on what his birth name was, for example, his mother might have been able to tell he had some sort of extreme ability, and named him in accordance with an anatolian god or something.