Jérôme Napoléon "Bo" Bonaparte (5 July 1805 – 17 June 1870) was an American farmer, chairman of the Maryland Agricultural Society, first president of the Maryland Club,[1] and the son of Elizabeth Patterson and Jérôme Bonaparte, brother of Napoleon I.

The annulment caused the rescission of his right to carry the Bonaparte name, although the ruling was later reversed by his cousin, Napoleon III.

[6] In November 1829, Jérôme Napoleon married Susan May Williams, an heiress from Baltimore, and it is from them that the American line of the Bonaparte family descended.

They had two sons: Jerome Napoleon Bonaparte II (1830–1893), who served as an officer in the armies of both the United States and France, and Charles Joseph Bonaparte (1851–1921), who became the United States Attorney General and Secretary of the Navy, and also created the Bureau of Investigation, which was later rechristened the Federal Bureau of Investigation.

In an attempt to match the railroad heiress's dowry, the groom's maternal grandfather, William Patterson — one of the wealthiest men in Maryland — gave the couple Montrose Mansion as a wedding gift.