Coulter
A surname that can point either to a maker or user of a plowshare, or to a Scottish place-name tied to a loch near St. Ninian’s.
The #1,725 most common surname in the United States (2010 Census) — about 1 in every 14,874 Americans shares it.
Etymology
The surname has more than one plausible explanation. In English, it may be occupational or descriptive, from the word *coulter* for the cutting blade of a ploughshare. In Scotland, the name is also linked to the place called Coulter in Lanarkshire, and some writers have treated the surname as locational from that district. Older Irish and Scottish spelling forms also show it alongside related surnames such as Colter, Coalter, and O'Colter, so the name may have developed independently in more than one region.
History
The name appears in records in Britain by the medieval and early modern period, and later turns up in London and North American records as people moved from the British Isles. Scottish surname dictionaries often connect it with the Lanarkshire place-name, while English reference works note the common noun for a plough blade. Because both explanations are historically attested, the surname’s origin is best treated as mixed rather than single-source.
Origin
Regions
Variant spellings
Fun fact
A coulter is the vertical knife or blade on a plough that cuts the soil before the share turns it over.
From the historical record
“COULSON. See Colsou. COULTER. A lake at St. Nynians, cc Lanark, is so called. COULTHART. According to Tradition and a most elaborate Pedigree, the Coult- harts of Coultliart, co. Wigtown, are des- cended from Coulthartus, a Roman lieute- nant who fought under Julius Agilcola, and who gave his name to certain lands…”
— Patronymica Britannica: a dictionary of the family names of the United Kingdom