Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
DECKER
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
From the German Decher, the quantity of ten; probably a name given to the tenth child. It may be one who decks or covers ships or vessels.
Patronymica Britannica (1860)
DECKER. Dutch, iMlier, one who covers roofs with tile, slate, or thatch.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Occupational name
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English