Background
Leman was the son of Sir William Leman, 1st Baronet and his wife Rebecca Prescot, daughter of Edward Prescot, of Thoby, in Essex, and of London.
Leman was the son of Sir William Leman, 1st Baronet and his wife Rebecca Prescot, daughter of Edward Prescot, of Thoby, in Essex, and of London.
He inherited the baronetcy on the death of his father in 1667. He was appointed High Sheriff of Hertfordshire for 1676-1677.
In 1690, Leman was elected Member of Parliament for Hertford and held the seat until 1695.