(1) He is married to Sarah Frances Seymour.
They got married on June 3, 1766, he was 26 years old.
Child(ren):
(2) He is married to Frances Pratt.
They got married on June 7, 1775 at M2, he was 35 years old.
Child(ren):
http://www.cracroftspeerage.co.uk/online/content/index359.htm
Robert [Stewart], 1st Baron Londonderry later 1st Viscount Castlereagh later 1st Earl of Londonderry later 1st Marquess of Londonderry
1st son of Alexander Stewart MP, of Mount Stewart, Co. Down, and Ballylawn Castle. Co. Donegal, by his wife and cousin Mary Cowan, sister and hrss. of Sir Robert Cowan, Governor of Bombay, and only surv. dau. of Alderman John Cowan, of Londonderry
Robert Stewart | |||||||||||||||||||||||||||||||||||||||
(1) 1766 | |||||||||||||||||||||||||||||||||||||||
Sarah Frances Seymour | |||||||||||||||||||||||||||||||||||||||
(2) 1775 | |||||||||||||||||||||||||||||||||||||||
Frances Pratt |