Career
He succeeded to the baronetcy on the death of his father on 29 January 1680. He was a Member of Parliament for Kent from 27 July 1698 to 8 January 1701 and again from 19 May 1708 to 11 January 1710. Lennard dropped dead of apoplexy aged 72 while walking in Drury Lane, London.
Lennard married Elizabeth Roy, daughter of Delalyne Hussey of Shapwick Dorset and widow of John Roy of Woodlands Dorset.