For background on how the map was made (and its flaws), see the relevant blog entry.
|Armstrong||numerous in Ulster, also Mayo/Sligo & Meath/Monaghan. Scottish. A famous Border name. Ir. Tréanlámhach. It can also be an anglicisation of Mac Thréinfhir and Ó Labhradha Tréan, q.v. SGG.|
|Strong||fairly numerous: Ulster, Laois-Offaly etc. English epithet, in Ulster 17 cent.|
|Stronge||fairly numerous: Ulster, especially East. See Strong.|