Benjamin Mendenhall Jr. was born on 5 May 1691 at Concord, Chester County, Pennsylvania. He was the son of
Benjamin Mendenhall and
Ann Pennell. Benjamin Mendenhall Jr. married
Lydia Roberts, daughter of
Owen Roberts and
Mary (Unknown), on 3 September 1717 at Quaker Monthly Meeting, Gwynedd, Chester County, Pennsylvania. Benjamin Mendenhall Jr. was recommended as a Friends Minister Jun 2 1725. He went to preach in North Carolina with Samuel Hopwood where he died. 2 June 1725. He died on 13 May 1743 at Perquimans County, North Carolina, at age 52. His estate was proved on 1 October 1743 at Chester County, Pennsylvania.