Maslama ibn Abd al-Malik (, in Greek sources , Masalmas; ) was an Umayyad prince and one of the most prominent Arab generals of the early decades of the 8th century, leading several campaigns against the Byzantine Empire and the Khazar Khaganate. He achieved great fame especially for leading the second and last Arab siege of the Byzantine capital Constantinople, and for strengthening the Muslim presence in the Caucasus, becoming the "founder of Islamic Derbent".