Show ContentsGlennon History, Family Crest & Coats of Arms

The surname Glennon is Anglicized form of the Gaelic Patronymic name Mag Leannáin, meaning "son of Leannán." The root word of this name is "leann," meaning "cloak."

Early Origins of the Glennon family

The surname Glennon was first found in Leinster, where they held a family seat from ancient times.

Early History of the Glennon family

This web page shows only a small excerpt of our Glennon research. Another 71 words (5 lines of text) covering the year 1659 is included under the topic Early Glennon History in all our PDF Extended History products and printed products wherever possible.

Glennon Spelling Variations

Because early scribes and church officials often spelled names as they sounded, a person could have many various spellings of his name.Many different spelling variations of the surname Glennon were found in the archives researched. These included Gillion, Glennon, Glenon, Glennin, Glenning and many more.

Early Notables of the Glennon family

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

Glennon Ranking

In the United States, the name Glennon is the 11,867th most popular surname with an estimated 2,487 people with that name. 1


United States Glennon migration to the United States +

A massive wave of Irish immigrants hit North America during the 19th century. Although many early Irish immigrants made a carefully planned decision to leave left Ireland for the promise of free land, by the 1840s immigrants were fleeing a famine stricken land in desperation. The condition of Ireland during the Great Potato Famine of the late 1840s can be attributed to a rapidly expanding population and English imperial policies. Those Irish families that arrived in North America were essential to its rapid social, industrial, and economic development. Passenger and immigration lists have revealed a number of early Irish immigrants bearing the name Glennon:

Glennon Settlers in United States in the 19th Century
  • Michael Glennon, who landed in Mobile, Ala in 1851 2

Australia Glennon migration to Australia +

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

Glennon Settlers in Australia in the 19th Century
  • Nicholas Glennon, aged 25, a labourer, who arrived in South Australia in 1855 aboard the ship "Glentanner" 3

Contemporary Notables of the name Glennon (post 1700) +

  • John Alan Glennon (b. 1970), American geographer and explorer
  • His Eminence John Joseph Glennon (1862-1946), American (Irish born), Roman Catholic Archbishop of the Archdiocese of Saint Louis, made a Cardinal in 1946
  • Bert Glennon (1895-1967), American cinematographer, director, writer, and actor
  • Paul W. Glennon, American Democratic Party politician, Candidate for Presidential Elector for Massachusetts, 1956; Alternate Delegate to Democratic National Convention from Massachusetts, 1960 4
  • Margaret Glennon, American Republican politician, Delegate to Republican National Convention from Ohio, 2008 4
  • Margaret Glennon, American Democratic Party politician, Candidate for Connecticut State House of Representatives from Trumbull, 1948 4
  • James Glennon, American Republican politician, Candidate for Connecticut State House of Representatives from Derby, 1948 4
  • Edward J. Glennon, American Democratic Party politician, Justice of New York Supreme Court 1st District, 1925-53; Justice of the Appellate Division of the New York Supreme Court 1st Department, 1940-49 4
  • Edward Glennon, American Democratic Party politician, Alternate Delegate to Democratic National Convention from Minnesota, 1956 4
  • Edward Glennon, American Democratic Party politician, Alternate Delegate to Democratic National Convention from Wisconsin, 1912 4
  • ... (Another 3 notables are available in all our PDF Extended History products and printed products wherever possible.)


The Glennon 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: Generosus et animosus
Motto Translation: Generous and courageous


  1. "What are the 5,000 Most Common Last Names in the U.S.?". NameCensus.com, https://namecensus.com/last-names/
  2. Filby, P. William, Meyer, Mary K., Passenger and immigration lists index : a guide to published arrival records of about 500,000 passengers who came to the United States and Canada in the seventeenth, eighteenth, and nineteenth centuries. 1982-1985 Cumulated Supplements in Four Volumes Detroit, Mich. : Gale Research Co., 1985, Print (ISBN 0-8103-1795-8)
  3. South Australia Passengerlists (Retrieved 10th November 2010). Retrieved from https://archives.sa.gov.au/sites/default/files/documentstore/passengerlists/1855/GRG35_48_1_55-35_Glentanner.pdf
  4. The Political Graveyard: Alphabetical Name Index. (Retrieved 2015, November 16) . Retrieved from http://politicalgraveyard.com/alpha/index.html


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