| Constituency | Dates |
|---|---|
| Malton | 30 Dec. 1741 – 1768 |
Family and Education
b. ?1709, 2nd s. of Sir Roger Mostyn, 3rd Bt., and bro. of Savage and Sir Thomas Mostyn. educ. Westminster June 1722, aged 13; Ch. Ch. Oxf. 25 June 1728, aged 18. unm.
Offices Held
Ensign 1733; capt. 16 Ft. 1736; capt.-lt. 2 Ft. Gds. 1742, capt. and lt.-col. 1743; groom of the bedchamber 1746 – d.; col. army 1747; col. 7 Ft. 1751 – 54, 13 Drags. 1754 – 58; maj.-gen. 1757; col. 5 Drags. 1758 – 60; lt.-gen. 1759; col. 7 Drags. 1760 – 63, 1 Drag. Gds. 1763 – d.; gov. Minorca 1768 – d.; gen. 1772.
biography text
Mostyn was returned by his uncle and his cousin, the 1st and 2nd Marquesses of Rockingham. Voting with the Government, he was classed about 1749-50 by the 2nd Lord Egmont as one of the 12 ‘most obnoxious men of an inferior degree’ in the House of Commons, with the comment: ‘Jack Mostyn, very ill inclined to us and forward’.
He died 16 Feb. 1779.
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