Original sentence: He married, in 1735, Rebecca, daughter and heiress of Charles Samborne Le Bas, of Pipewell Abbey, Northamptonshire, by whom he had two daughters and two sons, George Simon and William, who succeeded him as 2nd and 3rd earl respectively
Edited sentence: He married, in 1735, Rebecca, daughter and heiress of Charles Samborne Le Bas, of Pipewell Abbey, Northamptonshire, by whom he had two daughters, Elizabeth (born 1738 or 1739) and Anne (1741-1746), and two sons, George Simon and William, who succeeded him as 2nd and 3rd earl respectively