indicate the level to which a name has been verified.
Type Surname (from given name & from location)
Meaning & History
Could be an Irish form of the Breton surname de Léon, meaning "of Léon", an Anglicized form of Gaelic Ó Duilleáen, from the given name Dallán "little blind one", or be from a Norman French personal name derived from Ancient Germanic Dillo, possibly a byname from dil- "destroy".