Complex sentence: 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.
Split into simpler sentences: The progenitor of the Ayyubid dynasty was Najm ad-Din Ayyub bin Shadhi. He belonged to a Kurdish tribe whose ancestors settled in the town of Dvin, in northern Armenia.