The Vast majority of Lowery's
(Lowry, Lowrey) in the United States are of Scottish descent. These settlers
came either directly from Scotland or from Ulster (Northern Ireland). The
Scottish people from Ulster are often referred to as "Scot-Irish". Most
of the earliest settlers did NOT come from Scotland. They came from Ulster.
When this country was first successfully settled in Virginia by the British, the settlers were of British nationality. This included citizens from one of Britons major colonies, Scotland. The first non-English nationalities to migrate to this country in quantify were the Germans. Their migration began in the early 1700's. The next non-English nationality to migrate to this country was the Scot-Irish from Northern Ireland. They came in masses in the 1730's. These three groups, the English, the Germans, and the Scot-Irish (Scottish) were the people that carried this nation into the 1800's. They were involved in the French-and Indian Wars, the Revolutionary War, the War of 1812, etc. They are the ones that wrote the Constitution, the Bill of Rights, and put this country on its path to be the "Greatest Nation in the World".
In the early 1600's, King James 1 of England, Scotland, and Ireland, confiscated much of Ulster from the Irish. He resettled Ulster with English and especially LowLander Scots, most of whom were Presbyterians. The Scots who were brought in, and their descendants, are generally called Scotch-Irish, but obviously they were really Scots in Ireland - a quite different thing. These Scots are the ones that later migrated in large number to the "New World" in the 1730's. According to most estimates, there were about a quarter of a million Ulster Scots in the colonies before the Revolutionary War.
In general non-Ulster Scots came later than those who had sojourned on Ulster soil. Many of the HighLander Scots settled in North Carolina. In 1769 some four thousand of the tenants of two major land holding families, the MacDonalds and the MacLeods, left Scotland almost in a body, settling mainly in the Cape Fear valley of North Carolina, where some other Highlanders already were.