Kayi tribes living in Domanic Plains with Willow Springs in West Anatolia, Osman Bey the son of Ertugrul Ghazi, who was born in Willow in the year 1258. In 1281, when she was 23 years old, she married to the daughter of Omer Bey, Malhun Hatun, from the Kayi tribe. Had will take charge of the principality, Orhan Bey was born from this marriage. Later he married the daughter of Şeyh Edebali Honey Babe. Alaeddin Bey was born from this marriage. In 1281 the year his father lost Ertugrul Ghazi, Osman after his father's death was Bey of the Kayi tribe.