Murrah ibn Ka'b
Murrah ibn Ka'b ibn Luay ibn Ghalib ibn Fihr ibn Malik was a man from Quraysh tribe, supposed to have lived in the 4th century. He was the sixth-in-line of Muhammad's grandfathers. He is the common ancestor of all four of Muhammad's grandparents. Wikipedia
Born: 22 AD
Parents: Ka'b ibn Lu'ayy
Children: Kilab ibn Murrah and Yaqazah ibn Murrah
Great grandchildren: Abd Manaf ibn Qusai and 'Abd Manaf ibn Zuhrah
Great-grandparent: Ghalib ibn Fihr
Grandchildren: Qusayy ibn Kilab and Zuhrah ibn Kilab
Grandparent: Lu'ayy ibn Ghalib