Wahshi Ibn Harb
Wahshy ibn Harb (literally The Savage son of War) was the Ethiopian slave of Jubayr ibn Mut'im and a Sahabi (companion of the Islamic prophet Muhammad). He is best known for killing a leading Muslim general, Hamza ibn ‘Abd al-Muttalib Muhammad's uncle, prior to accepting Islam, and afterwards killing Musaylimah, the leader of an enemy apostate army who were waging war against the Muslims.
Read more about Wahshi Ibn Harb: During The Battle of Uhud, Conversion To Islam