His uncle, Abu Talib:
After Grandfather's death The Messenger of Allah went to live with his uncle, Abu Talib, the full brother of his father, Abdullah. Abdul-Muttalib (before he died) had told His son (Abu Talib) to take good care of the boy so he was always protective towards him. He treated him with more kindness than he showed to his own sons, Ali, Ja'far and Aqil.