Don \don\ as a boy's name is pronounced dahn. It is of English origin. Short form of names beginning with Don-. Mythology: the Irish Donn was known as king of the underworld. Use of the Welsh Gaelic surname Donne as a given name may be in honor of John Donne, the 17th century poet. Donnan was a seventh-century Irish saint. Actor Don Cheadle.
For more information, see also the related name Donald.