When Eleazer Dewey was born on 26 June 1745, in Lebanon, New London, Connecticut Colony, British Colonial America, his father, Jonathan Dewey, was 36 and his mother, Mary Collier, was 32. He married Elizabeth Porter on 16 May 1771, in Northampton, Hampshire, Massachusetts Bay Colony, British Colonial America.
Welsh: from the personal name Dewi, Welsh form of David . In some cases the name may arise from the dedication of parish churches in places called Llanddewi (Saint David's), of which there are several.
Anglicized form of a French Huguenot name of uncertain form and origin. Traditionally it is recorded as Douai, a habitational name from a city so named 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’.
In some cases possibly also an Americanized form of Dutch De Weij (archaic De Wey): cognate of Van der Weij (see Wey ).