Show ContentsO'Donellan Surname History

Many variations of the name O'Donellan have evolved since the time of its initial creation. In Gaelic it appeared as Ó Domhnallain, derived from the personal name of Domhallan, Lord of Clan Breasail, from whom the sept claims descent. 1

Early Origins of the O'Donellan family

The surname O'Donellan was first found in Galway (Irish: Gaillimh) part of the province of Connacht, located on the west coast of the Island, where they held a family seat from ancient times.

Early History of the O'Donellan family

This web page shows only a small excerpt of our O'Donellan research. Another 70 words (5 lines of text) covering the years 1588, 1609, 1616, 1640, 1649, 1660, 1665 and 1705 are included under the topic Early O'Donellan History in all our PDF Extended History products and printed products wherever possible.

O'Donellan Spelling Variations

Pronunciation, rather than spelling, guided scribes and church officials when recording names during the Middle Ages. This practice often resulted in one person's name being recorded under several different spellings. Numerous spelling variations of the surname O'Donellan are preserved in these old documents. The various spellings of the name that were found include Donellan, Donnellan, Donnelan, Donelan, Donnellin, Donellin and many more.

Early Notables of the O'Donellan family

Prominent amongst the family at this time was

  • Reverend Nehemiah Donellan (d. 1609), Archbishop of Tuam, who translated the New Testament into Irish. His name is written in Irish Fearganinm O'Domhnallain, and he was born in the county of Galway, a...

Migration of the O'Donellan family

A massive amount of Ireland's native population left the island in the 19th century for North America and Australia in hopes of finding more opportunities and an escape from discrimination and oppression. A great portion of these migrants arrived on the eastern shores of the North American continent. Although they were generally poor and destitute, and, therefore, again discriminated against, these Irish people were heartily welcomed for the hard labor involved in the construction of railroads, canals, roadways, and buildings. Many others were put to work in the newly established factories or agricultural projects that were so essential to the development of what would become two of the wealthiest nations in the world. The Great Potato Famine during the late 1840s initiated the largest wave of Iris immigration. Early North American immigration and passenger lists have revealed a number of people bearing the name O'Donellan or a variant listed above: Patrick Donellen arrived in Philadelphia in 1860; Mary Donellin settled in Virginia in 1655; Catherine Donnellan settled in Quebec in 1848.



The O'Donellan Motto +

The motto was originally a war cry or slogan. Mottoes first began to be shown with arms in the 14th and 15th centuries, but were not in general use until the 17th century. Thus the oldest coats of arms generally do not include a motto. Mottoes seldom form part of the grant of arms: Under most heraldic authorities, a motto is an optional component of the coat of arms, and can be added to or changed at will; many families have chosen not to display a motto.

Motto: Omni violentia major
Motto Translation: Too strong for any violence.


  1. MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)


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