In letters from the Ottoman Sultans, when addressing the kings of Aq Qoyunlu, such titles as "King of Iranian Kings", "Sultan of Iranian Sultans", "Shāhanshāh-e Irān Khadiv-e Ajam" "Shahanshah of Iran and Ruler of Persia", "Jamshid shawkat va Fereydun rāyat va Dārā derāyat" "Powerful like Jamshid, flag of Fereydun and wise like Darius" have been used. Uzun Hassan also held the title "Padishah-i Irān" "Padishah of Iran", which was re-adopted again in the Safavid times through his distaff grandson Ismail I, founder of the Safavid Empire.