Show ContentsDimon History, Family Crest & Coats of Arms

The original Gaelic form of the name Dimon was Ó Diamain. 1

Early Origins of the Dimon family

The surname Dimon was first found in County Londonderry (Irish: Doire), a Northern Irish county also known as Derry, in the province of Ulster, where they held a family seat from very ancient times.

Early History of the Dimon family

This web page shows only a small excerpt of our Dimon research. Another 244 words (17 lines of text) covering the year 1000 is included under the topic Early Dimon History in all our PDF Extended History products and printed products wherever possible.

Dimon 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 Dimon are preserved in these old documents. The various spellings of the name that were found include Diamond, Dymond, Dyment, Diment, Dymott, Dimont and many more.

Early Notables of the Dimon family

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


United States Dimon migration to the United States +

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 Dimon or a variant listed above:

Dimon Settlers in United States in the 19th Century
  • Dr. Dimon, who landed in San Francisco, California in 1851 2
  • Chas. L. Dimon, aged 74, who settled in America, in 1896
Dimon Settlers in United States in the 20th Century
  • Christy Dimon, aged 29, who immigrated to the United States, in 1910

Contemporary Notables of the name Dimon (post 1700) +

  • James "Jamie" Dimon (b. 1956), American business executive, current chairman, president and chief executive of JPMorgan Chase
  • John Edward Dimon (1916-1993), American Republican Party politician
  • Charles Augustus Ropes Dimon (1841-1902), American volunteer soldier in the Union Army during the American Civil War
  • Orville P. Dimon, American politician, Member of New York State Assembly from Chemung County, 1882 3
  • John E. Dimon, American Republican politician, Delegate to Republican National Convention from New Jersey, 1964, 1972 3
  • J. Homer Dimon, American politician, Mayor of Columbus, Georgia, 1922-31, 1935 3
  • Oliver Dimon Kellogg (1878-1932), American mathematician
  • Dimon S. Fanton (1838-1882), American politician, 9th Warden of the Borough of Norwalk, Connecticut (1856-1859)


The Dimon 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: Miseris Succurrere Disco
Motto Translation: I learn to succour the distressed.


  1. MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)
  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. The Political Graveyard: Alphabetical Name Index. (Retrieved 2015, December 11) . Retrieved from http://politicalgraveyard.com/alpha/index.html


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