Ayxun or Aissó was a nobleman who led a revolt in Barcelona, Ausona, and Girona in 826 to 827. His identity is uncertain.
Aissó is thought to have been either a Goth and former lieutenant of the deposed Count Berà, or an Arab (Ayxun ibn Sulayman ibn Yaqdhan al-Arabí), the son of Sulayman al-Arabi who had been imprisoned in Aachen after being captured by Frankish forces at Girona.