John McHenry

This c. 1820 portrait of Captain John McHenry (1790-1822) by Philip Tilyard hangs in the Maryland Historical Society Museum in Baltimore, Maryland. Find-a-Grave gives this short biography of John McHenry:

"Son of James McHenry (1753-1816) who was an aide to Gen. George Washington and Lafayette, Secretary of War and namesake for Fort McHenry and Margaret Caldwell McHenry (1762-1833). John McHenry attended St. Mary’s College in Baltimore, became a lawyer, was active in the Presbyterian Church, member of the Society of Cincinnati and in several civic organizations. During the War of 1812 he was in the Fifth Regiment of the Maryland Militia. He married Juliana Elizabeth Howard, the daughter of Col. John Eager Howard and Peggy Chew Howard, on Tuesday, Dec. 7, 1819 at the Howard home Belvidere. She died months after giving birth to their son James Howard McHenry (1820-1888). John McHenry died in Mercersburg, Pa. of the fever and less than two weeks later his brother-in-law John Eager Howard Jr. (1788-1822), who came to help, died. The two are buried next to each other in the Presbyterian Church cemetery in Mercersburg." -- Find-a-Grave

However, Christopher George says this of John McHenry who was a Corporal in Fifth Regiment.

"John McHenry (1791-1822) a Calvert Street merchant, was the second son of Daniel McHenry, brother of Ballymena, Ireland-born James McHenry, George Washington's secretary and secretary of war, for whom Fort McHenry was named." -- Christoper George, Terror in the Chesapeake, footnote 36 chapter 10, page 192-3.