Abd Allah ibn Uthman (Arabic: عبد الله ابن عثمان, romanized: ʿAbd Allāh ibn ʿUthmān; c. 620 – November 625), was the son of the third caliph Uthman (r. 644–656) and Ruqayya bint Muhammad. Born in Abyssinia, Abd Allah was the first grandson of the Islamic prophet Muhammad.