The northern branch of the Mosaferids, a family originally from Ṭārom in Daylam, ruled in Arrān under Marzobān b. Moḥammad b. Mosāfer (330-46/941-57), followed by his son Ebrāhīm, extending momentarily as far north as Darband, but failing to maintain their position in Azerbaijan and Arrān under pressure from the Kurdish Rawwadids of Tabrīz.