Complex sentence: His father, Teimuraz Batirashvili, an ethnic Georgian and Orthodox Christian, belongs to the Georgian gvari Batirashvili, and his mother, an ethnic Kist and a Muslim, belonged to the Melkhi clan.
Split into simpler sentences: His father, Teimuraz Batirashvili, is an ethnic Georgian and Orthodox Christian, belongs to the Georgian gvari Batirashvili. His mother was a Kist (an ethnic subgroup of Chechen origin from Georgia) and a Muslim, and belonged to the Melkhi clan.