Rebecca Lyon Armstrong was born 2 May 1719 in Enniskillen, County Fermanagh, Northern Ireland, United Kingdom to Archibald Armstrong (1695-1785) and Ann Lyon (1698-1790) and died 16 November 1797 Carlisle, Cumberland County, Pennsylvania, United States of unspecified causes. She married John Armstrong (1717-1795) 1747 in Northern Ireland, United Kingdom.
|Offspring of Rebecca Armstrong and John Armstrong (1717-1795)|
|James Armstrong (1748-1828)|
|John Armstrong (1758-1843)||25 November 1758 Carlisle, Cumberland County, Pennsylvania, United States||1 April 1843 Red Hook, Dutchess County, New York, United States||Alida Livingston (1761-1822)|