Uthman ibn Ali

[1][2] Uthman and his brothers Abbas, Abdullah, and Ja'far accompanied Husayn ibn Ali in his journey from Mecca to Kufa and were martyred at the Battle of Karbala.

[5] Uthman's mother, Fatima, was the daughter of Hizam ibn Khalid ibn Rabi'a from the Arab tribe of Banu Kilab.

She was the mother of three more sons of Ali, namely Abbas, Abdullah, and Ja'far, and for this reason she became known as Umm al-Banin.

Khawli ibn Yazid al-Asbahi shot an arrow at Uthman's forehead resulting in him falling off his horse.

[1][2] Uthman ibn Ali was 21 years old when he was killed on the day of Ashura.