James Watt was born 30 January 1736 in Greenock, Renfrewshire, Scotland, United Kingdom to James Watt (1699-1782) and Agnes Muirhead (1701-1753) and died 25 August 1819 Handsworth, Staffordshire, England, United Kingdom of unspecified causes. He married Margaret Millar (1736-1773) 15 July 1764 in Glasgow, Lanarkshire, Scotland, United Kingdom. He married Ann MacGregor (1738-1832) 29 July 1776 in Birmingham, West Midlands, England, United Kingdom.
|James Watt (1769-1848)||5 February 1769 Glasgow, Lanarkshire, Scotland, United Kingdom||2 June 1848 Aston Hall, Aston, Warwickshire, England, United Kingdom||Margaret Redfern (1792-aft1851)|
|Margaret Watt (1767-1796)|
|Gregory Watt (1777-1804)|
|Janet Watt (1779-1794)|