Background
Knatchbull was the eldest son of Sir Thomas Knatchbull, 3rd Baronet and his wife Mary Dering, daughter of Sir Edward Dering, 2nd Baronet.
Knatchbull was the eldest son of Sir Thomas Knatchbull, 3rd Baronet and his wife Mary Dering, daughter of Sir Edward Dering, 2nd Baronet.
In 1712, he succeeded his father in the baronetcy. In 1713 he was elected Member of Parliament for Kent and represented the constituency until 1715. He was elected Member of Parliament for Kent again in 1722 and held the seat until 1727.
In the following year, he was returned for Lostwithiel, a seat he held until his death in 1730.
4th Parliament of Great Britain. 6th Parliament of Great Britain. 7th Parliament of Great Britain]
In 1702 Knatchbull was elected Member of Parliament for Rochester and held the seat to 1705.