Yes, that's him. Both reputations with Ilmara and Fögas are "unknown". Also I still can trade with armorer and interact with other NPCs in Fögas. I entered St Admus Abbey, killed few monsters, then returned to forest and quicksaved. After this, trading with Nibdam became unavailable, but his name still shows green. My device is Xiaomi Redmi Note 4X.
Upd: game version 1.1.1084