Margaret Alida Rebecca Armstrong was born 17 July 1800 in Red Hook, Dutchess County, New York, United States to John Armstrong (1758-1843) and Alida Livingston (1761-1822) and died 15 February 1872 Manhattan, New York, United States of unspecified causes. She married William Backhouse Astor (1792-1875) 20 May 1818 in New York City, New York, United States.
Children
| Name | Birth | Death | Joined with |
| Emily Astor (1819-1841) | 1819 | 18 February 1841 New York City, New York, United States | Samuel Cutler Ward (1814-1884) |
| John Jacob Astor (1822-1890) | 10 June 1822 Manhattan, New York, United States | 22 February 1890 Manhattan, New York, United States | Charlotte Augusta Gibbes (1825-1887) |
| Mary Alida Astor (1823-1881) | |||
| Laura Eugenia Astor (1824-1902) | |||
| William Backhouse Astor, Jr. (1829-1892) | 12 July 1829 Manhattan, New York, United States | 25 April 1892 Paris, Île-de-France, France | Caroline Webster Schermerhorn (1830-1908) |
| Henry Astor (1830-1918) | |||
| Sarah Todd Astor (1832-1832) | |||
Siblings
| Name | Birth | Death | Joined with |
| Horatio Robert Gates Armstrong (1790-1859) | |||
| Henry Beekman Armstrong (1791-1884) | |||
| John Armstrong (1793-1853) | |||
| Robert Livingston Armstrong (1797-1834) | |||
| Margaret Alida Rebecca Armstrong (1800-1872) | 17 July 1800 Red Hook, Dutchess County, New York, United States | 15 February 1872 Manhattan, New York, United States | William Backhouse Astor (1792-1875) |
| James Kosciuszko Armstrong (1801-1868) | |||
| Edward Armstrong (1802-1802) | |||
| William Armstrong (1814-1902) | |||
Residences
Footnotes (including sources)
| ‡ General |