Scanning Lexicanum summaries of the twenty nine died during the Heresy, eight became the original Masters of the Grey Knights, and the ultimate fate of the final three (Garro, Loken, and Gallor) is yet unknown.
You might create a Chapter descended from loyalist members of a Traitor Legion without needing them to have been a Knight-Errant; we know Morturg continued to serve the Imperium post-Heresy, and Garro's original seventy had to have been put to some use eventually.
|