[14] Ulster Scots people, displaced through hardship, emigrated in significant numbers around in the British Empire and especially to the American colonies, later Canada and the United States.
After some minor settling during the late Tudor and early Stuart periods, the first major influx of Lowland Scots and Border English Protestant settlers into Ulster came in the first two decades of the 17th century.
Montgomery was granted half of Lord of Upper Clandeboye Conn McNeill O'Neill's land, a significant Gaelic lordship in Ulster, as a reward for helping him escape from English captivity.
This scheme was intended to confiscate all the lands of the Gaelic Irish nobility in Ulster and to settle the province with Protestant Scottish and English colonists.
This was of particular concern to James VI of Scotland when he became King of England, since he knew Scottish instability could jeopardise his chances of ruling both kingdoms effectively.
[citation needed] There was a generation of calm in Ireland until another war broke out in 1689, again due to political conflict closely aligned with ethnic and religious differences.
[citation needed] The Williamite forces, composed of British, Dutch, Huguenot and Danish armies, as well as troops raised in Ulster,[22][23] ended Jacobite resistance by 1691, confirming the Protestant minority's monopoly on power in Ireland.
Finally, another major influx of Scots into northern Ireland occurred in the late 1690s, when tens of thousands of people fled a famine in Scotland to come to Ulster.
With the enforcement of Queen Anne's 1703 Test Act, which caused further discrimination against all who did not participate in the established church, considerable numbers of Ulster-Scots migrated to the colonies in British America throughout the 18th and 19th centuries.
In 2010's documentary The Hamely Tongue, filmmaker Deaglán Ó Mocháin traces back the origins of this culture and language, and relates its manifestations in today's Ireland.
[35] The North American ancestry of the X-linked form of the genetic disease congenital nephrogenic diabetes insipidus has been traced to Ulster Scots who travelled to Nova Scotia in 1761 on the ship Hopewell.