Few phrases appear more often in American family histories than "we're Scots-Irish." Somewhere between 27 and 30 million Americans claim Scots-Irish descent, and for millions of families — especially across Appalachia, the Carolinas, Tennessee, Kentucky, and the broader South — it is the deepest ancestral identity they know. Yet it is also one of the most misunderstood. Scots-Irish families are not a blend of Scottish and Irish ancestry in the way the name suggests. They are something more specific and, in many ways, more remarkable: Lowland and Border Scots who spent several generations in the north of Ireland before crossing the Atlantic — a people who made two great migrations and carried their surnames, intact, through both.
That means a Scots-Irish surname is almost always a Scottish clan or family name — and behind it stands a specific Scottish landscape, a crest, a tartan, and centuries of documented history. This guide traces the whole journey: who the Scots-Irish were, why their names are overwhelmingly Border and Lowland Scottish names, and what your own surname can tell you about the route your family took.
Scots-Irish Surnames at a Glance
The most common Scots-Irish surnames in America include: Armstrong, Bell, Boyd, Campbell, Craig, Crawford, Cunningham, Elliott, Ferguson, Graham, Hamilton, Houston, Irvine (Irwin/Erwin), Johnston (Johnstone), Kerr (Carr), Knox, Maxwell, McClure, McKee, Montgomery, Morrison, Patterson, Scott, Stewart (Stuart), Wallace, Watson, Wilson and Young. If you carry one of these names — in any spelling — use the search bar above to find the family crest and heritage gifts for your name.
Who Were the Scots-Irish?
The story begins in 1603, when James VI of Scotland became James I of England and the centuries-old Anglo-Scottish frontier — the violent, lawless world of the Border reivers — lost its reason for existing overnight. The new king pacified the Borders with deliberate ruthlessness, and one of his instruments was transplantation: troublesome riding families were encouraged, pressured, or simply forced to relocate to the new Plantation of Ulster, the organised settlement of Scottish and English Protestants on confiscated land in the north of Ireland that began in earnest in 1610.
They were joined by a second, larger stream of voluntary settlers from the Scottish southwest — Ayrshire, Galloway, Renfrewshire, and Lanarkshire — for whom Ulster was visible across twenty miles of water on a clear day. Land was cheap, rents were low, and for Lowland farming families squeezed at home, the short crossing to Antrim and Down was the opportunity of a generation. By the late 1600s, perhaps 100,000 Lowland Scots had settled in Ulster, concentrated in Antrim, Down, Londonderry, Tyrone, Armagh, Donegal and Fermanagh — a Presbyterian, Scots-speaking community that remained culturally distinct from both the native Irish and the English settlers around them.
The Great Migration to America
The second migration began in 1717. Rising rents, religious disabilities imposed on Presbyterians, and a series of poor harvests set off five great waves of emigration from Ulster to colonial America between 1717 and 1775, carrying perhaps a quarter of a million people. They landed mainly at Philadelphia and New Castle, found the good coastal land already taken, and pushed inland and then south down the Great Wagon Road — through the Shenandoah Valley of Virginia, into the Carolina piedmont and backcountry, and over the ridges into the mountains.
They became the defining settlers of Appalachia. The frontier suited a people whose grandparents had farmed contested land in Ulster and whose great-great-grandparents had survived the reiving Borders; self-reliance, kin loyalty, and a deep suspicion of distant authority travelled with them. Their fiddle tunes became old-time and bluegrass music. Their Presbyterian meeting houses seeded churches across the backcountry. And their surnames — Border and Lowland Scottish surnames, two migrations from home — became some of the most common names in the American South.
What Your Scots-Irish Surname Tells You
Scots-Irish surnames fall into recognisable streams, and the stream often points to the Scottish region your family left first.
The Border reiver names — Armstrong, Elliott, Bell, Graham, Johnston, Irvine, Kerr, Little, Maxwell, Scott, Young — descend from the riding families of the Anglo-Scottish frontier, many transplanted to Ulster in the pacification after 1603. If your Scots-Irish name is on this list, your trail runs Borders → Ulster → America, and our Border clans guide covers the first chapter in detail. Note the spelling drift: Scottish Johnstone generally became Johnston in Ulster and America, and Irvine became Irwin or Erwin — same families, softened spellings.
The Ayrshire and southwest names — Boyd, Crawford, Cunningham, Houston, Montgomery, Wallace, Hamilton, Wilson, Patterson — came mostly from the voluntary settlement stream out of the Scottish southwest, the region closest to the Ulster coast. The Montgomery and Hamilton settlements of 1606 in north Down, organised by two Ayrshire lairds, were the true beginning of the Ulster Scots story, predating the official Plantation itself.
The Highland and national names — Campbell, Stewart, Ferguson, Morrison, McClure, McKee — remind us that the migration drew from all over Scotland, with Argyll in particular sending settlers across the short crossing to Antrim. The Mc spelling, incidentally, proves nothing about Irish versus Scottish origin: Mc and Mac are the same word, abbreviated differently, and both appear on both sides of the water.
Did You Know?
Roughly a third of all American presidents claim Scots-Irish descent — Andrew Jackson (whose parents emigrated from County Antrim two years before his birth), James K. Polk (a descendant of Ulster Pollocks, the name worn smooth in transit), James Buchanan, Andrew Johnson, Chester Arthur, William McKinley, Woodrow Wilson and more. Davy Crockett, Sam Houston and Daniel Boone's frontier world was substantially a Scots-Irish world. When NASA's Neil Armstrong — a Border reiver surname — carried a fragment of Armstrong tartan toward the Moon, the journey from Liddesdale had reached its furthest point yet.
Tracing Your Scots-Irish Line
Scots-Irish research runs through three record sets: American records back to the immigrant ancestor (typically arriving 1717–1775 through Pennsylvania or the Carolinas), Ulster records for the Irish generations (church registers, the 1630 muster rolls, the Hearth Money Rolls of the 1660s), and finally Scottish records for the family's first home. Many families cannot document every link in the chain — the Ulster records are famously incomplete — but the surname itself remains the strongest single clue, because the names held firm even when the paperwork did not.
And here is the part many Scots-Irish descendants don't realise: you inherit both traditions. Your family's generations in Ulster are a genuine Irish chapter — many Scots-Irish names exist in our Irish family crest collections for exactly that reason — while the clan or family behind the name remains fully Scottish, with its crest, tartan and history intact. An Armstrong family from Tennessee has an equal claim on the Liddesdale reivers and on the Fermanagh townlands their ancestors farmed. That is not a contradiction. It is the whole story.
Frequently Asked Questions
Is Scots-Irish the same as Irish?
No — Scots-Irish (called Ulster Scots in Britain and Ireland) describes Lowland and Border Scottish families who settled in the north of Ireland in the 1600s and then emigrated to America in the 1700s. The ancestry is Scottish in origin, with a genuine Irish chapter of several generations in Ulster.
What are the most common Scots-Irish surnames?
Armstrong, Campbell, Wilson, Johnston, Graham, Bell, Stewart, Scott, Hamilton, Boyd, Crawford, Cunningham, Elliott, Kerr, Montgomery, Wallace, Patterson, Irwin, McKee and McClure are among the most frequent — nearly all traceable to Scottish Border, Ayrshire or Lowland families.
Do Scots-Irish families have a clan and a tartan?
Yes — because Scots-Irish surnames are Scottish surnames, almost every one connects to a recognised Scottish clan or Border family with its own crest and tartan. A Scots-Irish Armstrong is entitled to exactly the same Armstrong heritage as one whose family never left Scotland.
Why did the Scots-Irish settle in Appalachia?
Arriving through Philadelphia from 1717 onward, they found the coastal land taken and moved down the Great Wagon Road into the Virginia valleys and Carolina backcountry — cheap frontier land that suited a people with five generations of experience holding contested ground.
Carry a Scots-Irish Name?
If your family carries one of these names, you can honour both halves of the journey: we make family crest woven blankets, mugs, garden flags, ornaments and more for the Scottish clan behind your name — and Irish family crest versions of many of the same names for the Ulster chapter. Start with our dedicated gift guides for Armstrong, Graham, Campbell and Hamilton, or see how families display their crest at home.
The Heritage Trio — a woven blanket for the sofa, a mug for the morning, a garden flag for the front of the house — keeps a Scots-Irish name part of daily life, three centuries and two migrations from home. To go deeper, see our guides to the Border Clans and Reiver Families, the Clans of Ayrshire and Galloway and Scottish clans with strong Irish connections — or find your clan from scratch with our guide to finding your Scottish clan.
