A sultan á cents alÄ á ad-D Ä `` n YÅ `` suf ibn AyyÅ `` b ( 1138 â `` 1193 ) was a famous kurdish Sultan during the Crusades . á cents alÄ á ad-D Ä `` n YÅ `` suf ibn AyyÅ `` bi ( , á cents alÄ á al-D Ä `` n YÅ `` suf ibn AyyÅ `` b , Kurdish : Ø Ù â Ù Ø Ø Ù â Ø Û Ù Ø Ù â Û Ù Ø Û , Selah ` edÃ nÃ EyubÃ , , SalÄ h-ed-D Ä `` n-e AyyÅ `` bÄ `` ) ( c. 1138 â `` March 4 , 1193 ) , better known in the Western world as Saladin , was a Kurdish Muslim , who became the Ayyubid Sultan of Egypt and Syria .