George married December 6, 1837, the stepdaughter of his brother, Loammi Baldwin, Jr., namely, Catherine Richardson Beckford, daughter of Captain Thomas and Catherine (Williams) Beckford, of Charlestown.
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In his fourteenth year he made some sketches of the fortifications of Boston harbor in the war of 1812, of which his brother Loammi Baldwin, Jr. was the chief engineer.
Baldwin | Alec Baldwin | James Baldwin | Stanley Baldwin | Baldwin Locomotive Works | William Baldwin | James Baldwin (writer) | Baldwin, Nassau County, New York | Daniel Baldwin | Baldwin Spencer | Adam Baldwin | Baldwin Piano Company | Stephen Baldwin | Baldwin II of Jerusalem | Loammi Baldwin, Jr. | James Mark Baldwin | Henry Baldwin Hyde | Baldwin II | Walter Baldwin Spencer | Thomas Scott Baldwin | Monica Baldwin | Michael Baldwin | Burr Baldwin | Baldwin IV of Jerusalem | Baldwin I of Jerusalem | Walter Baldwin | Treat Baldwin Johnson | Tommy Baldwin | Tab Baldwin | Simeon Baldwin |
His five sons, Cyrus Baldwin (1773–1854), Benjamin Franklin Baldwin (1777–1821), Loammi Baldwin, Jr. (1780–1834), James Fowle Baldwin (1782–1862), and George Rumford Baldwin (1798–1888) were also well-known engineers.