Banu Judham

The Judham (Arabic: بنو جذام, romanized: Banū Jud͟hām) was a large Arab tribe that inhabited the southern Levant and northwestern Arabia during the late antique and early Islamic eras (5th–8th centuries). Under the Byzantine Empire, the tribe was nominally Christian and fought against the Muslim armies between 629 and 636, until the Byzantines and their Arab allies were defeated at the Battle of Yarmouk. Afterward, the Judham converted to Islam and became the largest tribal faction of Jund Filastin (district of Palestine).

The origins of the Judham are not clear. They may have been descendants of the northern Arabs, though the tribe itself claimed Yamanite (southern Arab) origins, perhaps in order to associate themselves with their Yamanite allies in Syria.