Dunsmure is not a separate surname. It is one spelling among five, and the 1901 census shows exactly how small a share of the family it holds.
Scotland that year counted 704 Dunsmores, 351 Dunsmuirs, 24 Dunsmures and 4 Dunmores. The -ure ending you are researching sat 7,410th on the national list, a thin branch on a well-populated tree.
That arithmetic matters, because the records you want are almost never filed under your own spelling.
Dundemore, Before Anyone Wrote It Dunsmure
The origin is territorial and Fife. The old lands of Dundemore lay near Lindores, and the modern name of the place is Denmuir. The Oxford Dictionary of Family Names in Britain and Ireland derives Dunsmore from Denmuir, formerly Dundemore, or alternatively from places called Dunmore in Stirlingshire and Ross-shire with an intrusive s.
The early bearers are all de Dundemore. Henry de Dundemore witnessed a charter about 1219; Sir John de Dundemore was a regent under Alexander III; Patrick de Dundemer of Fife appears about 1296, in the years of the Ragman Roll; Richard de Dunmore sat on an inquest jury at Perth in 1305.
Watch those four entries: the middle syllable collapses, the d becomes an s, and by the sixteenth century the name is settling into Dunsmore and Dunsmuir. Dunsmure is one further stop, not a distinct family. Our guide to the clans and families of Fife covers the county it came out of, and our history of the rare Combrie spelling shows the same problem elsewhere.
Where the -ure Spelling Actually Sat
Thin, but real. FamilySearch's trees hold about 133 Dunsmures in Scotland against 15 in Wales and 9 in India, which is the profile of a Scottish name that traveled a little with the empire and never took root abroad under this spelling.
That is the honest picture. There is no chief of Dunsmure, no clan, no distinct history separable from the Dunsmores and Dunsmuirs. Our collection of lesser-known Celtic surnames deals with several names in the same position.
The Branch That Became Dinsmore
The interesting migration happened under yet another spelling. Families of this name crossed to Ulster in the seventeenth century, and by the eighteenth their descendants were writing themselves Dinsmore and Dinsmoor.
In 1723 Robert Dinsmoor and his wife Margaret settled at Nutfield in New Hampshire, the Ulster colony that became Londonderry and Windham, founded a few years earlier by sixteen families out of the north of Ireland. The line prospered: Robert's grandson Samuel Dinsmoor, born 1766, graduated from Dartmouth, sat in Congress and served as governor of New Hampshire from 1831 to 1834, and Samuel's own son held the same office two decades later.
Two state governors from one emigrant household explains why the Dinsmore forms are far commoner in America than any Scottish spelling. Our history of the Scots-Irish journey from Ulster to America and our list of Scots-Irish surnames both cover the traffic that carried them.
How to Research a Name This Thin
- Search Dunsmure, Dunsmore, Dunsmuir, Dunmore, Densmore, Dinsmore and Dinsmoor as one set. Never search the -ure form alone.
- For a Scottish line, begin in north Fife and the Forth valley and work back from a certificate; our guide to Scotland's 1855 registration explains what those records carry.
- For an American line, test the Ulster route first. New Hampshire town records reach back further than most Irish parish registers.
- Expect the spelling to change between a baptism and a burial. That is normal here, not a sign of the wrong family.
Frequently Asked Questions About the Dunsmure Name
Is Dunsmure the same name as Dunsmore?
Yes. The dictionaries treat Dunsmure, Dunsmuir, Dunsmore, Densmore and Dinsmore as one name, and Scottish clerks used them interchangeably within single families.
Does Dunsmure mean great fort?
Not directly. The oldest form is Dundemore in Fife, and the s is a later intrusion. The Gaelic dùn mòr reading fits Dunmore in Stirlingshire, which is a second and separate route into the same modern spellings.
Are American Dinsmores really Scottish?
Usually Scottish by way of Ulster rather than directly. The New Hampshire Dinsmoors are the documented example, arriving in 1723 with the Nutfield settlement.
Sources and Further Reading
- Oxford Dictionary of Family Names: Dunsmore — Denmuir, formerly Dundemore, and the intrusive s.
- Surname Database: Dinsmore — Henry de Dundemore c. 1219 and the variant list.
- Dunsmure in the 1901 Scottish census — 24 bearers.
- Dunsmore in the 1901 Scottish census — 704 bearers.
- Dunsmuir in the 1901 Scottish census — 351 bearers.
- FamilySearch: Dunsmure — country counts in the trees.
- Samuel Dinsmoor — Nutfield in 1723 and the governorships.
- George F. Black, The Surnames of Scotland — for testing early forms.