Family name origins & meanings
- Irish : (now mainly Counties Clare and Cork): reduced Anglicized form of Gaelic Ó Daghnáin ‘descendant of Daghnán’, possibly a diminutive of dagh ‘good’.
- Irish : variant of Dineen.
- English (of Norman origin) : habitational name from Dinan, in Côtes-du-Nord, Brittany.
- In some cases, possibly an altered spelling of French Dinant, a habitational name from Dinant, a place in the Belgian province of Namur.