An-Nasir Yusuf, fully al-Malik al-Nasir Salah al-Din Yusuf ibn al-Aziz ibn al-Zahir ibn Salah al-Din Yusuf ibn Ayyub ibn Shazy, was the Ayyubid Kurdish Emir of Syria from his seat in Aleppo, and the Sultan of the Ayyubid Empire from 1250 until the sack of Aleppo by the Mongols in 1260. Wikipedia