...Huh. Ok. I came across something in the Total War subreddit that made me do a double take and I went on a search binge, and I'm kind of baffled.
Borek Forkbeard, the leader of the Dum expedition in DL, is a canon character. We know this. What I didn't know was that Borek has a nephew who joined Gotrek and Felix in their second expedition to Karag Dum. His name is Varek Varigsson, and he is a scholar who writes down chronichles and events down in his book as they occur, and wanted to record the expedition to Karag Dum or something.
Varek is a Gotrek and Felix character, but here's the thing. He doesn't have a wiki page despite playing a part in the book about as much as Malakai Makaisson. I figured out who he was by google translating the Spanish Warhammer Wiki.
For those who can speak spanish.
I'm going to guess his canonicity in DL is in the same spot as Belegar's brother. Technically canon but not in DL. I sure went on a journey to discover his existence. If he existed in DL we would be paying him the 2000 gold.