| Constituency | Dates |
|---|---|
| Flintshire | 1701 (Dec.) – 1702 |
| Cheshire | 1702 – 1705 |
| Flint Boroughs | 1705 – 1708 |
| Flintshire | 1708 – 1713 |
| Flint Boroughs | 1713 – 1715 |
| Flintshire | 1715 – 1734 |
Family and Education
b. 31 July 1673, 1st s. of Sir Thomas Mostyn, 2nd Bt., M.P., by Bridget, da. and h. of Darcy Savage of Leighton, Cheshire. educ. Jesus, Oxf. 1690. m. 20 July 1703, Lady Essex Finch, da. of Daniel Finch, M.P., 7th Earl of Winchilsea and 2nd Earl of Nottingham, 6s. 6da. suc. fa. 1700.
Offices Held
Constable, Flint castle 1702 – 05; paymaster of marines 1711; teller of the Exchequer Dec. 1714 – June 1716; ld. lt. Flints. 1727 – d.
Address
Main residence: Mostyn, Flints.
biography text
A leader of the Flintshire Tories and a supporter of the Hanoverian succession, Mostyn followed his father-in-law, Lord Nottingham. Made a teller of the Exchequer when Nottingham joined the Whig Government on George I’s accession, he was dismissed with Nottingham in 1716, thereafter consistently voting against the Government, till he retired from Parliament in 1734.
He died 8 May 1739.
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