Hananya "Dayan of the Gate" ben Haninai al-Nahr Paqod, Gaon of Sura

GAON of SURA from 689 to 694

He was previously designated as kohen, but see discussion:- https://www.geni.com/discussions/215660 For him to be a descendant of a Bostnai from the paternal line, he cannot be neither kohen nor levi because Bostnai has tradition of being paternally descended from the tribe of Judah (being a descendent of King David).

This ga'on should not be confused with the Bostnai himself nor Hananya haKohen from Pumpadita.