Ayasun Ottoman (1 November 1337 – 27 November 1354) was a granddaughter of Orhan Bey and a niece of Suleyman Pasha. On 29 March 1354, during a party at Sogut, Suleyman seduced Ayasun and made love to her in a nearby warm stream, taking her as his mistress. Shortly after, she became pregnant with his child. She died on 27 November 1354 after a period of sickness, taking her unborn child with her.