Dudley Cosby, 1st Baron Sydney

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Colonel Acland and Lord Sydney: The Archers by Sir Joshua Reynolds. Lord Sydney to the left. Sir Joshua Reynolds - Colonel Acland and Lord Sydney- The Archers - Google Art Project.jpg
Colonel Acland and Lord Sydney: The Archers by Sir Joshua Reynolds. Lord Sydney to the left.

Dudley Alexander Sydney Cosby, 1st Baron Sydney (c. 1730 22 January 1774), was an Irish politician and diplomat.



Cosby was the son of Pole Cosby, of Stradbally, Queen's County, and Mary, daughter of Henry Dodwell. Dudley Cosby was his grandfather. [1]

Political and diplomatic career

Cosby was elected to the Irish House of Commons as one of two representatives for Carrick in 1763, a seat he held until 1768. [2] In 1763 he was also appointed Minister Resident to Denmark, where he was to assist the aged Envoy Extraordinary, Walter Titley. He arrived in Copenhagen in February 1764, but returned to Britain already the following year. [3] In 1768 he was elevated to the Peerage of Ireland as Lord Sydney, of Leix, Baron Stradbally.


Lord Sydney married Lady Isabella, daughter of Thomas St Lawrence, 1st Earl of Howth and Isabella King, in December 1773. He died in January the following year, when the barony became extinct. Lady Sydney died in October 1836. [1]

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  1. 1 2 "Dudley Alexander Sydney Cosby, 1st and last Baron Sydney and Stradbally". thepeerage.com. Retrieved 27 January 2019.
  2. "leighrayment.com Irish House of Commons 1692-1800". Archived from the original on 1 June 2009. Retrieved 19 October 2010.{{cite web}}: CS1 maint: unfit URL (link)
  3. "Dudley Cosby, Robert Gunning 1764–1771". Camden. Third Series. 36: 165–181. July 1926. doi:10.1017/S204217100000604X. ISSN   2042-1710.
Parliament of Ireland
Preceded by Member of Parliament for Carrick
With: Robert French
Succeeded by
Diplomatic posts
Preceded by Minister Resident to Denmark
(Walter Titley was Envoy Extraordinary during the time)

Succeeded by
Peerage of Ireland
New creation Baron Sydney