Abbas ibn Abd al-Muttalib

Al-Abbas ibn Abd al-Muttalib (c. 566 – c. 653 CE) was a paternal uncle and sahabi (companion) of the Islamic prophet Muhammad, just three years older than his nephew. A wealthy merchant, during the early years of Islam he protected Muhammad while he was in Mecca, but only became a convert after the Battle of Badr in 624 CE (2 AH). His descendants founded the Abbasid Caliphate in 750.

Source: Wikipedia — https://en.wikipedia.org/wiki/Abbas_ibn_Abd_al-Muttalib