Armstrong Family History
Armstrong Name Meaning
English and Scottish (mainly Northumberland and the Scottish Borders): nickname from Middle English arm + strang for someone who was ‘strong in the arm’. Irish (Ulster): adopted as an English equivalent of Gaelic Ó Labhradha Tréan ‘strong O'Lavery’ or Mac Thréinfhir literally ‘son of the strong man’.
Source: Dictionary of American Family Names ©2013, Oxford University Press