Show ContentsLongmant History, Family Crest & Coats of Arms

There are many Irish surnames being used today in forms that are quite different than their original, ancient forms. Longmant originally appeared in Gaelic as Ó Longain, which is derived from the word long, which means tall. 1

Early Origins of the Longmant family

The surname Longmant was first found in Down (Irish:An Dún) part of the Province of Ulster, in Northern Ireland, formerly known as county St Mirren, where they held a family seat from ancient times.

Early History of the Longmant family

This web page shows only a small excerpt of our Longmant research. Another 94 words (7 lines of text) covering the years 1689 and 1758 are included under the topic Early Longmant History in all our PDF Extended History products and printed products wherever possible.

Longmant 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 Longmant are preserved in these old documents. The various spellings of the name that were found include Langan, Longan, Langen, Longen, O'Lonagain, Langhan, Langin, O'Langane, O'Longane, O'Langan and many more.

Early Notables of the Longmant family

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

Migration of the Longmant 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 Longmant or a variant listed above: Laurence Langan, an 'enforced emigrant' from Ireland, who arrived in America in 1743; John Longan, who sailed to Philadelphia in 1775; William Langen, who sailed to Pennsylvania in 1777.



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


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