I'm creating a Mind-map of the lore of warhammer (in french) in order to be accurate when I create stories for my home-made scenarios. It allow players to meet real character of the lore, sometimes very important, and make the story "real". It also allow me to create complex plot with politicals implication, emotions and three dimension characters. The death of Throgrim's sons may create very powerful scenes, but I can't play it, because my players will surely ask me theirs names. Plus, without names, I can't do research on them (maybe there is nothing to tell, but maybe there is). Of course, I can create those names, but for an important character like Throgrim (king of dwarves AND alive), I want to be as accurate as possible.
French wiki about Snikch (fr) explain that he lost two sons and his daughter, killed by this skaven assassin.
After some research about Thorgrim Grudgebearer, it appear that he had children. According to the Thorgrim Grudgebearer wiki page and this YouTube video about High King Thorgrim Grudgebearer, he lost them in the war against Chaos.
Do we know their names?