Khadija bint Khuwaylid
Usama's father, Zayd ibn Haritha, was a companion and adopted son of Muhammad. He is commonly regarded as the third person to have accepted Islam, after Muhammad's wife Khadija bint Khuwaylid, and Muhammad's cousin Ali ibn Abi Talib. He was an Arab of the Udhra branch of the Kalb tribe of Najd, central Arabia&lt;ref name="Landau-Tasseron/Tabari p. 6"&gt;Landau-Tasseron/Tabari p. 6.&lt;/ref&gt; Zayd's mother, Suda bint Thaalaba, was from the Maan branch of the Tayy tribe.&lt;ref name="Landau-Tasseron/Tabari p. 6"&gt;Landau-Tasseron/Tabari p. 6.&lt;/ref&gt;