Knatchbull’s ancestor, Richard Knatchbull of Lympne, bought Mersham Hatch, four miles south-east of Ashford, in the reign of Henry VII.
Knatchbull was appointed to the bench in 1600, was knighted in April 1604, and licensed in the following August to travel abroad for a year. Between November 1606 and November 1607 he served as sheriff of Kent, but evidently neglected his duties, incurring fines totalling £106 13s. 4d. for failing to execute process.
Following the death of his second wife in 1625, Knatchbull married the widow of a wealthy London alderman, so bringing him within the orbit of lord keeper Sir Thomas Coventry*, whom he entertained in August 1635 at Mersham.
