Khadir Ghaïlan (Library of Congress, Ahmad al Khādir ibn 'Ali Ghaylān; generally known to English-speakers as Gayland or Guyland) was a powerful warlord in Morocco during the seventeenth century. He controlled large swathes of the region until his death in September 1672 at the hands of Moulay Ismail. During the 1660s was noted for his clashes with the Anglo-Irish garrison at Tangier. Despite gaining a success over the garrison at the Battle of Tangier (1664) he was never able to seriously threaten the port. He agreed a number of truces with the Governors of Tangier.