Complex sentence: Gostun was a deputy ruler of the Bulgar Kutrigurs in (582-584) appointed by Bayan (Avar Khagan) and according to the Namelist of Bulgarian Rulers was of the Ermi clan.
Split into simpler sentences: Gostun was a deputy ruler of the Bulgar Kutrigurs in (582-584) appointed by Bayan (Avar Khagan). According to the Namelist of Bulgarian Rulers was of the Ermi clan.