JENYNS, John (1659-1717), of Hayes, Mdx.

Published in The History of Parliament: the House of Commons 1715-1754, ed. R. Sedgwick, 1970
Available from Boydell and Brewer



1710 - 1 Feb. 1717

Family and Education

b. 1659, 1st s. of Roger Jenyns of Hayes by Sarah, da. of Joseph Latch. m. (lic. 16 Feb. 1682) Jane, da. of James Clitherow of Boston House, Mdx., 3s. suc. fa. 1693.

Offices Held


Jenyns’s father, who bought the manor of Hayes in 16771 and also owned an estate in the Isle of Ely,2 was the grandson of Sir John Jenyns, or Jennings, of Sandridge, Hertfordshire, and the first cousin of the Jennings sisters, Frances, Duchess of Tyrconnel, and Sarah, Duchess of Marlborough. He was an original member of the corporation set up by Act of Parliament in 1663 to drain the fens, serving successively as conservator, bailiff, and surveyor general of fens till his death in 1693.

Jenyns himself was elected to the Fen Corporation as conservator at the age of 25, succeeding on his father’s death to the surveyor generalship, which he held for twenty years.3 Though returned as a Tory for Cambridgeshire, he voted against the French commercial treaty in 1713 and Steele’s expulsion in 1714. Classed at George I’s accession as a Tory who might often vote Whig, he voted against the septennial bill in 1716, dying 1 Feb. 1717.

Ref Volumes: 1715-1754

Author: Romney R. Sedgwick


  • 1. Lysons, Environs of London, ii. 590.
  • 2. Lysons, Cambs. 29, which confuses Roger Jenyns with his son and namesake.
  • 3. W. M. Palmer, 'Fen Office Docs.', Camb. Antiq. Soc. Proc. xxxviii. 96.