About Mary FitzMaurice, 4th Countess of Orkney
Lived 1755 – 1831 (aged 76). Mary FitzMaurice, 4th Countess of Orkney was a politician.
Mary FitzMaurice, 4th Countess of Orkney (née O'Brien; 4 September 1755 – 30 December 1831) was a Scottish peer, the only surviving child of Murrough O'Brien, 1st Marquess of Thomond and Mary O'Brien, 3rd Countess of Orkney.
She was married to the Hon. Thomas FitzMaurice, younger brother of the 1st Marquess of Lansdowne, on 21 December 1777. Their son, born in 1778, was John FitzMaurice, Viscount Kirkwall (who was the father of the 5th Earl of Orkney, Thomas John Hamilton FitzMaurice). She succeeded her mother on 10 May 1791.
She died in 1831 in Beaconsfield.
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Important facts
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Frequently asked questions
Who was Mary FitzMaurice, 4th Countess of Orkney?
British noble (1755-1831)
When was Mary FitzMaurice, 4th Countess of Orkney born?
Mary FitzMaurice, 4th Countess of Orkney was born on 4 September 1755.
When did Mary FitzMaurice, 4th Countess of Orkney die?
Mary FitzMaurice, 4th Countess of Orkney died on 30 December 1831.
What was Mary FitzMaurice, 4th Countess of Orkney's occupation?
Mary FitzMaurice, 4th Countess of Orkney was a politician.
Sources & further reading
· Wikipedia: Mary FitzMaurice, 4th Countess of Orkney
· DBpedia: Mary FitzMaurice, 4th Countess of Orkney
Cite this page
APA: Biography.guide. (2026). Mary FitzMaurice, 4th Countess of Orkney. https://biography.guide/mary-fitzmaurice-4th-countess-of-orkney/
MLA: "Mary FitzMaurice, 4th Countess of Orkney." Biography.guide, https://biography.guide/mary-fitzmaurice-4th-countess-of-orkney/.
Chicago: "Mary FitzMaurice, 4th Countess of Orkney." Biography.guide. https://biography.guide/mary-fitzmaurice-4th-countess-of-orkney/.
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