Arthur Chichester, 1st Marquess of Donegall (13 June 1739 – 5 January 1799), known as Arthur Chichester until 1757 and as The Earl of Donegall between 1757 and 1791, was an English nobleman and politician in Ireland.
After taking his seat in the Irish House of Lords in 1765, Donegall served at Westminster as Member of Parliament for Malmesbury (1768–1774) by his friend Lord Suffolk, first following Suffolk and the Grenville group. Reportedly, he never spoke in the House, and did not stand for reelection in 1774.[2]
Lord Donegall married three times. On 11 September 1761, he married Lady Anne Hamilton, daughter of James Hamilton, 5th Duke of Hamilton. Before her death on 11 November 1780, they had seven children:
Lady Charlotte Anne Chichester (b. 1762),[3] who died in infancy.[4]
Lady Henrietta Chichester (b. 1765),[5] who died in infancy.[4]
On 24 October 1788 he married Charlotte (née Spencer) Moore, daughter of Conway Spencer, and widow of Thomas Moore. She died, without issue, on 19 September 1789.[4]
In October 1790, he married Barbara Godfrey, daughter of the Rev. Dr. Luke Godfrey, Rector of Midleton, County Cork.[6]
Lord Donegall held on lease a country residence at Butley Priory, Suffolk. He died on 5 January 1799, aged 59, at his London home in St James's Square, Westminster. His widow, the dowager Marchioness of Donegall, died on 28 December 1829.[4]