Board Thread:Warhammer 40k General Discussion/@comment-124.180.236.54-20121215084836/@comment-4264245-20121215150327

As far as I know, they "kept" the Clan Companies organisation after adhering to Codex Astartes post-Heresy, and Lieutenant Bion Henricos, who battled against Horus' forces after Istvaan V, came from "Sorrgol Clan" (Age of Darkness - Little Horus, page 252).