Among his siblings was Henry Beekman Armstrong, also a soldier in the War of 1812;[7] John Armstrong III, who became a gentleman farmer at La Bergerie;
Robert Livingston Armstrong;[8] Margaret Rebecca Armstrong (who married William Backhouse Astor Sr.);[9][10] James Kosciuszko Armstrong and William Armstrong.[11]
His paternal grandparents were General John Armstrong and Rebecca (née Lyon) Armstrong.[12] Among his Armstrong family, who were of "distinguished Scottish descent,"[13] was uncle James Armstrong, a physician who became a U.S. Congressman.[4] His paternal grandparents were Judge Robert Livingston and Margaret (née Beekman) Livingston. Among his Livingston family members were uncles Chancellor Robert R. Livingston and Edward Livingston.[11][10]
During the War of 1812, Armstrong fought on the American side, heading a company known as the Capt. Horatio G. Armstrong Co. with the 23rd Regiment Infantry.[14] He was eventually promoted to Major.[15]
Personal life
In 1814, Armstrong was married to Baltimore native Mary Hughes (1791–1866).[16] Mary was the youngest daughter of Margaret (née Sanderson) Hughes and Christopher Hughes, a banker and investor in real estate originally from County Wexford, Ireland. Among her siblings was older brother, Christopher Hughes (who served as the U.S. Minister to Sweden and the Netherlands),[17] and older sister Louisa Hughes (the wife of George Armistead).[18] Together they had three children:
John Horatio Armstrong (1815–1886),[19] who married Caroline Amelia Scheldt (1828–1912) in 1844.[20][21]
Margaret Hughes Armstrong (1817–1870)
Christopher Hughes Armstrong (1821–1884)
Armstrong died at his residence near Baltimore on April 6, 1858.[1] His widow was the administratrix of his estate.[22]
