John ibn Jowey

Jawn bin Huwai, also spelled Jawn bin Huwayy, was a Nubian Christian freedman who died in battle as part of Husayn ibn Ali's army at the Battle of Karbala on Muharram 10, 61 AH. Jawn was a former slave of Abu Dharr al-Ghifari. When Abu Dharr was exiled from Medina by Uthman ibn Affan, Jawn went to Ali ibn Abi Talib who invited him to stay on as his companion. When Ali ibn Abi Talib was killed, Jawn stayed with Ali's son Hasan ibn Ali and after Hasan's death, he moved in with Husayn ibn Ali. When Husayn left Medina, Jawn insisted on accompanying him.