 The progenitor of the Ayyubid dynasty , Najm ad @-@ Din Ayyub bin Shadhi , belonged to a Kurdish tribe whose ancestors settled in the town of Dvin , in northern Armenia . He belonged to the tribe of <unk> , itself a branch of the <unk> tribe . The <unk> were the dominant Kurdish group in the Dvin district . They were a member of the political @-@ military elite of the town . 
