Welsh: from the personal name Dewi, Welsh form of
David.
Anglicized form of a French Huguenot name
of uncertain form and origin. Traditionally it is recorded as
Douai, from a place in northern France, but it could also be
from Old Norman French du we(z) ‘of the ford’, from a variant
of standard French gué ‘ford’.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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