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.