Family name origins & meanings
- Irish (County Donegal) : Anglicized form of Gaelic Ó Duibhidhir or sometimes of Mac Duibhidhir (see Dwyer, also Dyer).
- English : of uncertain derivation; possibly from diver, an agent derivative of Middle English dive ‘to dip or plunge’, but if so the application is obscure. It may be a nickname for someone compared to a diving bird. Compare Ducker.