Show ContentsO'Daal History, Family Crest & Coats of Arms

The surname O'Daal comes from the Irish Gaelic surname Ó Dathaill. 1

Early Origins of the O'Daal family

The surname O'Daal was first found in County Roscommon (Irish: Ros Comáin) located in central Ireland in the province of Connacht, where O Dathaill was a sept of the Silmurray. 1

The name can also be found early on in County Cork where Walter O'Daal was charged with many thefts and jailed in 1295. John Roe MacDonagh O'Dahill resided in Bruree in County Limerick in 1579. Knogher O'Deaghill, born in 1529, appeared in front of a commission set to determine the bonds of the Earl of Ormond's ancient estates in County Kilkenny. 2

Early History of the O'Daal family

This web page shows only a small excerpt of our O'Daal research. More information is included under the topic Early O'Daal History in all our PDF Extended History products and printed products wherever possible.

O'Daal Spelling Variations

Spelling variations of this family name include: Dahill, O'Deaghill, O'Daal, O'Dahill and others.

Early Notables of the O'Daal family

More information is included under the topic Early O'Daal Notables in all our PDF Extended History products and printed products wherever possible.

Migration of the O'Daal family

Some of the first settlers of this family name or some of its variants were: Pat Dahill, who settled in Ontario in 1823; and Michael Dahill, who landed in Quebec in 1825. A number of immigrants disembarked in New York such as Thomas Dahil in 1866.



  1. MacLysaght, Edward, Supplement to Irish Families. Baltimore: Genealogical Book Company, 1964. Print.
  2. MacLysaght, Edward, Irish Families Their Names, Arms and Origins 4th Edition. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-2364-7)


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