De Nais
de NAIS—XI—de Nasshe, Nash, Naish; Middle English 'atten Ash,' 'atte Nash,' i.e., at the ash, from residence beside an ash-tree; the n of the article, having been attracted over, became the initial of the surname. Etymologically, therefore, Nash is precisely the same as Ashe (see Ais). This surname appears in Ireland soon after the Anglo-Norman invasion, and is now fairly common in Limerick and Kerry. In the latter county it is sometimes corrupted to de Rais. Compare with de Nás below.
Alphabetical Index to Irish Surnames