Who is the fifth mother of the Prophet, peace and blessings be upon him, and what is the order of his other mothers?

Fatima bint Sa'd al-Adhriyyah is the fifth mother of the Prophet, peace and blessings be upon him, and she is the mother of Qusayy, his fourth grandfather. As for his mothers before her, they are: Aminah bint Wahb (his direct mother), Fatima bint 'Amr ibn 'A'idh al-Makhzumiyyah (the mother of his father 'Abdullah), Salma bint 'Amr ibn al-Harith (the mother of his grandfather 'Abd al-Muttalib), and 'Atikah bint Murrah ibn Hilal (the mother of Hashim, the grandfather of his father).