Thomas Onslow, 2nd Baron Onslow

1679 - 1740


MP for Gatton, Chichester, Bletchingley and Surrey 1702-1717. 'He married a West Indian heiress, with whose money he rebuilt Clandon by Leoni.'

The estate of Thomas Lord Onslow was listed in the Jamaican Quit Rent books for 1754 as the owner of 1850 acres of land in St Thomas-in-the-East.


History of Parliament online

The portrait is from Onslow family at Clandon Park.

'A List of landholders in the Island of Jamaica together with the number of acres each person possessed taken from the quit rent books in the year 1754', TNA CO 142/31 transcribed at

Further Information

Elizabeth Knight

Associated Estates (1)

The dates listed below have different categories as denoted by the letters in the brackets following each date. Here is a key to explain those letter codes:

  • SD - Association Start Date
  • SY - Association Start Year
  • EA - Earliest Known Association
  • ED - Association End Date
  • EY - Association End Year
  • LA - Latest Known Association
- 1740 [EY] → Owner

Legacies Summary

Physical (1)

Country house
Clandon Park [Built] 
description →
Palladian mansion built over an existing Elizabethan house in 1730-1733 to designs of Giacomo Leoni by Thomas Lord Onslow, with the slavery-derived fortune of his wife Elizabeth Knight. Fire...

Political (1)

election →
Gatton Surrey
1702 - 1705
election →
Chichester Sussex
1705 - 1708
election →
Bletchingley Surrey
1708 - 1715
election →
Surrey Surrey
1715 - 1717

Relationships (2)

Father → Son
Husband → Wife

Addresses (1)

Clandon Park, Epsom Road, Guildford, Surrey, South-east England, England