De Móra
de MÓRA—XI—de Mora, More, Moore, etc.; Norman 'de la More,' Middle English 'atte Mor,' Latin 'de Mora,' i.e., at the moor or heath, from residence thereby; an old Anglo-Norman surname in Ireland; still found in parts of Munster and Connacht. Its anglicised forms cannot be distinguished from those of the Irish Ó Mórdha, which see.
Alphabetical Index to Irish Surnames