As described in historical dictionaries

An Etymological Dictionary of Family and Christian Names (1857)

(origin: Cor. Br.) Full of chat, tonguey; from the Cornish-British clap, prating.

Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.


Patronymica Britannica (1860)

CLAPP. An early Danish surname. Osgod Clapa was a Danisli noble at the court of Canute. From him it is supposed

Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.


Origin: English

Region of origin: British Isles

Country of origin: England

Religion of origin: Christian

Language of origin: English

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