Show ContentsLahy History, Family Crest & Coats of Arms

While many of Irish names are quite familiar to most, their original Gaelic forms are often forgotten and mysterious. The original Gaelic form of the name Lahy is Ó Laochdha, which is derived from the word laochdha, which means heroic. 1

Early Origins of the Lahy family

The surname Lahy was first found in County Tipperary (Irish: Thiobraid Árann), established in the 13th century in South-central Ireland, in the province of Munster, where they held a family seat from very ancient times, and were descended from the tribe of Uaithne.

Early History of the Lahy family

This web page shows only a small excerpt of our Lahy research. Another 144 words (10 lines of text) covering the years 1172, 1270, 1420 and 1641 are included under the topic Early Lahy History in all our PDF Extended History products and printed products wherever possible.

Lahy Spelling Variations

The recording of names in Ireland in the Middle Ages was an inconsistent endeavor at best due to competing dialects and languages, and the general illiteracy of the population. Research into the name Lahy revealed many spelling variations, including Leahy, Leahey, Leghe, Lahey, Lahy, O'Leahy and others.

Early Notables of the Lahy family

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


United States Lahy migration to the United States +

During the middle of the 19th century, Irish families often experienced extreme poverty and racial discrimination in their own homeland under English rule. Record numbers died of disease and starvation, and many others, deciding against such a fate, boarded ships bound for North America. The largest influx of Irish settlers occurred with Great Potato Famine of the late 1840s. Unfortunately, many of those Irish that arrived in Canada or the United States still experienced economic and racial discrimination. Although often maligned, these Irish people were essential to the rapid development of these countries because they provided the cheap labor required for the many canals, roads, railways, and other projects required for strong national infrastructures. Eventually the Irish went on to make contributions in the less backbreaking and more intellectual arenas of commerce, education, and the arts. Research early immigration and passenger lists revealed many early immigrants bearing the name Lahy:

Lahy Settlers in United States in the 19th Century
  • Pat Lahy, who settled in South Carolina in 1822
  • Judy and Julia Lahy, who settled in Boston Massachusetts in 1849

Australia Lahy migration to Australia +

Emigration to Australia followed the First Fleets of convicts, tradespeople and early settlers. Early immigrants include:

Lahy Settlers in Australia in the 19th Century
  • Mr. Cornelius Lahy, (b. 1814), aged 24, Irish labourer who was convicted in Tipperary, Ireland for 7 years for assault, transported aboard the "Elphinstone" on 29th December 1838, arriving in New South Wales, Australia 2

RMS Titanic
  • Mr. Thomas E. Lahy (d. 1912), aged 32, English Fireman/Stoker from London, England who worked aboard the RMS Titanic and died in the sinking 3


The Lahy 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: Tout vient de dieu
Motto Translation: All comes from God.


  1. MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)
  2. Convict Records Australia. Retrieved on 18th March 2022 from https://convictrecords.com.au/ships/elphinstone
  3. Titanic Passenger List - Titanic Facts. (Retrieved 2016, July 13) . Retrieved from http://www.titanicfacts.net/titanic-passenger-list.html


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