Nilüfer Hatun (, birth name Holofira, other names Bayalun, Beylun, Beyalun, Bilun, Suyun, Suylun) was a Valide Sultan; the wife of Orhan, the second sultan of the Ottoman Empire. She was mother of the next sultan, Murad I. Her other son was Kasim (died 1346). Some older sources also claim she was mother of Orhan's first son, Suleyman Pasha, which is disputed.