DINAN. A town in Brittany, whose viscounts, dating from the end of the tenth century, became ancestors of several noble houses in France, and of Foulke de Dinan, a baron by tenure under the Conqueror. His posterity were barons by writ from 1295 to 1509. The name has been wondei-fully corrupted, having gone through the following changes : Dinan, Dinant, DjTiaunt, Dynliam, Dymaut, Deimoud, Dyamond, Deyman, and Dayman.

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