Category:Robert Stewart, 1st Marquess of Londonderry

**Robert Stewart, 1st Marquess of Londonderry**
	Irish politician, born 1739
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Date of birth	27 September 1739
Date of death	6 April 1821; County Down
Country of citizenship	Republic of Ireland;
Occupation	politician;
Position held	Member of Parliament in the Parliament of Ireland; Member of the Privy Council of Ireland; member of the House of Lords;
Noble title	Marquess of Londonderry (1, death, 1816–1821); Earl of Londonderry (1, death, 1796–1821); Viscount Castlereagh (1, death, 1795–1821); Baron Londonderry (1, death, 1789–1821);
Father	Alexander Stewart;
Mother	Mary Cowan;
Sibling	Alexander Stewart;
Child	Robert Stewart, Viscount Castlereagh; Charles Vane, 3rd Marquess of Londonderry; Octavia Stewart; Lady Matilda Stewart; Lady Georgiana Stewart; Lady Caroline Stewart; Lady Selina Stewart; Frances Stewart; Lady Emily Stewart;
Spouse	Frances Stewart (1775–); Sarah Seymour (1766–);
Authority file
	Q5192091; VIAF ID: 83641857; GND ID: 1210102420; Library of Congress authority ID: no2009046944; Oxford Dictionary of National Biography ID: 26506; National Library of Israel J9U ID: 987009799284505171
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