Simplify the following text for a Grade 4 native English-speaking person.
Original: Fatimah bint Za ` idah â `` Khadijah 's mother â `` died around 575 , a member of the Banu ` Amir ibn Luayy ibn Ghalib tribe and a distant relative of Muhammad .
Simplified: Her nickname was Khadijah al-Kubra . She was the daughter of Khuwaylid ibn Asad and Fatimah bint Za ` idah .