Hafsa Hatun was born as the daughter of Fahreddin İsa Bey, the last bey (prince) of Aydinids.[2][4][5][2][6] She was married to Bayezid I in 1390 upon his conquest of Aydinids.[6] Her public works are located within her father's territory and may have been built before she married Bayezid I upon his conquest of Aydin in 1390.[6] She was one of the two royal Muslim wives of the sultans (as the other being Sitti Mükrime Hatun) appear to have left buildings, and even these may not as Ottoman public structures.[6] The wives of the sultans are notably absent as builders and endowers of such public monuments or institutions.[6] She bore no children to Bayezid.[6]