Caton was married to Mary "Polly" Carroll (1770–1846) at
Annapolis on November 25, 1787. Polly was the daughter of
Charles Carroll of Carrollton, the last surviving signer of the
Declaration of Independence. After the wedding, Carroll gave Polly and Richard a home, known as
Castle Thunder, which stood from 1787 to 1907. They were the parents of four daughters who survived to maturity, including: •
Marianne Caton (1788–1853), who married Robert Patterson, brother of
Elizabeth Patterson (wife of
Jérôme Bonaparte). After his death, she married the British statesman
Richard Wellesley, 1st Marquess Wellesley, then the
Lord Lieutenant of Ireland, brother of
Arthur Wellesley, 1st Duke of Wellington, who was believed to have been previously Marianne's
paramour. • Elizabeth Caton (1790–1862), who married
George Stafford-Jerningham, 8th Baron Stafford, son of
Sir William Jerningham, 6th Baronet. • Louisa Catherine Caton (1793–1874), who married
Colonel Sir Felton Hervey-Bathurst, 1st
Baronet. After his death, she married
Francis D'Arcy-Osborne, Marquess of Carmatthen, later the 7th
Duke of Leeds. • Emily Caton (1794/5–1867), who married the Scottish born
John McTavish, British Consul at Baltimore. They lived at
Carrollton Hall, near
Doughoregan Manor. His eldest three girls were known as "The Three American Graces" due to their beauty and the fact that all married into the
English aristocracy. His youngest daughter remained in Maryland and ran the family finances. Caton died in
Catonsville, Maryland, on May 19, 1845, in Baltimore and was buried at
Green Mount Cemetery. At his death, he died insolvent, leaving $2,762.
Descendants Through his youngest daughter Emily, his only child to have children, he was a grandfather of four, including
Charles Carroll MacTavish (1818–1868), who married Marcella Scott (a daughter of Gen.
Winfield Scott); Mary Wellesley MacTavish (1826–1850), who married Hon. Henry George Howard (youngest son of
George Howard, 6th Earl of Carlisle); Alexander Simon MacTavish (1829–1863), who married Ellen Gilmor; and Richard Caton MacTavish (1831–1841), who died young. ==Legacy==