Couch
A Cornish surname most often explained as a nickname from the Welsh word for “red.”
The #1,323 most common surname in the United States (2010 Census) — about 1 in every 11,600 Americans shares it.
Etymology
This surname is usually treated as a Cornish form of an older Celtic byname related to Welsh coch, meaning “red.” In that sense, it may originally have described someone with red hair, a ruddy complexion, or some other association with the color red. Some older writers also suggested a connection with the verb “to couch” in the sense of lying down or arranging, but the Celtic explanation is the standard one in the historical sources here.
History
Couch is strongly associated with Cornwall, where it appears as a regional Cornish surname and is often discussed alongside the related form Cooch. The name later spread beyond the southwest of Britain and is now found in English-speaking countries, including the United States. The best-known modern bearer is probably the novelist Sir Arthur Quiller-Couch, whose hyphenated surname preserved the Cornish element.
Origin
Regions
Variant spellings
Fun fact
The surname was sometimes linked by older scholars to the idea of someone “attached to their couch,” but that was a playful folk explanation rather than the main etymology.
From the historical record
“Ir. con{n, sense, &c. + the dim. suff. -dti] COUCH (Celt.) a Cornish form of Cooch [Wei. coch, red] COWPERTHWAITE (Scand.) I have been informed by a distant relative tjearing this surname that it is the name of a small place in Westmorland.”
— Surnames of the United Kingdom: a concise etymological dictionary (2 vols in 1)