Clan Armstrong
Clan Armstrong
Clan Armstrong is a Scottish clan from the Scottish Borders, especially in Liddesdale and the Debatable Lands. They are armigerous, meaning there is no current chief, and their historic seat was Mangerton. The clan crest shows an arm from the shoulder, armed, and their motto is Invictus maneo, meaning “I remain unvanquished.”
Origin and history
Legend says the first Armstrong was Siward Beorn (Siward Digry), a nephew of King Canute and the last Anglo-Danish Earl of Northumbria. The Armstrongs became powerful in the Border region and in the Debatable Lands. In the 13th to 15th centuries they often supported Scotland’s kings in the Wars of Independence. Notable early Armstrons include Gilbert Armstrong, who served David II; Sir Adam Armstrong, a knight in 1374; and John Armstrong, who fought at the Battle of Otterburn in 1388. Around 1425, John Armstrong built a strong tower. The Armstrongs could raise thousands of horsemen and once controlled much of the Debatable Lands.
Conflicts and decline
In 1528, Lord Dacre attacked their tower, and the Armstrongs retaliated by burning Netherby. James V saw the clan as a threat, and John Armstrong of Gilnockie was hanged at Hawick. During the 16th century their reputation for lawlessness grew as they refused to fully acknowledge either crown. Still, their conflicts did not reach the scale of other border battles.
End of independence and emigration
The Union of the Crowns in 1603 ended the Armstrongs’ independence. In 1610 Archibald Armstrong of Mangerton was hanged in Edinburgh after a raid on Penrith, which led to a royal campaign to pacify the Borders. Many Armstrong families scattered and many later moved to Ulster, especially County Fermanagh. Today, Armstrong is a common name in Ulster.
Legacy and notable descendants
Some Armstrons served as royalists in the wars of the 1640s and 1650s. Notable descendants include Arctic explorer Sir Alexander Armstrong and Neil Armstrong, the first person on the Moon, who carried a piece of Armstrong tartan. The Armstrong Baronets descend from Gilnockie. Comedian Alexander Armstrong is also a descendant, as is Edwin Armstrong, the inventor of FM radio. An active Clan Armstrong Trust was established in 1978 to keep the clan connected.
Language and names
Gaelic connections include the name Mac Tréan-Labhraidh (meaning “son of the strong man”), which became Armstrong. Related names include Traynor, Treanor, Trainor, and McCreanor. After the Ulster Plantations, many Armstrongs, especially Catholics, adopted Traynor. A notable Gaelic-speaking Armstrong was Dr. Robert Armstrong, who published an early Gaelic-English dictionary in 1825. The Gaelic form for Gilnockie, Geal Cnocan, means “Little White Hill.”
This page was last edited on 2 February 2026, at 21:52 (CET).