I don't think Fyodor would be mentioned in an obscure manner, more like Wulfgar was in "The Silver Marches"---that is, I guess I'm asking if there's any NPC's mentioned in a substantial manner (in Wulfgar's case, he was included in a 'side bar' that took up 2/3 of a page). If they didn't include anything like that then it's no big deal.