Show ContentsDiffee History, Family Crest & Coats of Arms

The original Gaelic form of Diffee was Ó Dubhthaigh. The first portion of the name is the word "dubh," which means "black," while the second portion is likely an obsolete Irish forename. 1

The sept claim descent from the ancient Heremon Kings of Ireland. Through O'Conner Faley, Lords of Offaley (now Offaly), they descend from "Cahir Mor, King of Leinster in the beginning of the second century. He divided his great possessions amongst his thirty sons in a Will called 'The will of Cahir More,' contained in the 'Book of Leacan' and in the 'Book of Balymote.' His posterity formed the principal families in Leinster." 2 O'Duffy was listed as one of these such families.

Early Origins of the Diffee family

The surname Diffee was first found in Connacht (Irish: Connachta, (land of the) descendants of Conn), where they held a family seat from very ancient times, and were one of the many families descended from the great Kings of Ireland called the "Three Collas." Descending from the Clan Colla was Duffy, Lord of Fermanagh.

However, "there are several distinct septs of O'Duffy. One belongs to the parish of Lower Templecrone in the diocese of Raphoe, Co. Donegal, the patron saint of which is the seventh century Saint Dubhthach, or Duffy. The Connacht sept, the centre of whose territory was Lissonnuffy or Lissduffy near Strokestown, named after them, was remarkable for the number of distinguished ecclesiastics it produced." 3

Without a doubt, the oldest records of the family include: Muireadach Ó'Dubthaigh (Murdagh O'Duffy) (1075-1150), Archbishop of Tuam in the county of Connaught and Cadhla Ó'Dubthaigh, (Cele O'Duffy) Archbishop of Tuam, Ambassador to Henry II in 1175. 3

The Monaghan branch of the family were principally found in Attyduffy or Attyduff 2 and "modern statistics show that it is now most numerous name in Co. Monaghan." 1

Early History of the Diffee family

This web page shows only a small excerpt of our Diffee research. Another 266 words (19 lines of text) covering the years 1075, 1150, 1175, 1501, 1527, 1615, 1671, 1675, 1809 and 1871 are included under the topic Early Diffee History in all our PDF Extended History products and printed products wherever possible.

Diffee Spelling Variations

A name was often recorded during the Middle Ages under several different spelling variations during the life of its bearer because literacy was rare there was no real push to clearly define any of the languages found in the British Isles at that time. Variations found of the name Diffee include Duffey, Duff, Duffy, O'Duffey, O'Duffy, Duffe, O'Duffe, Doey, Dohey, Doohey, O'Dowey and many more.

Early Notables of the Diffee family

Prominent amongst the family at this time was Father Eugene O'Duffy (c. 1527-1615), preacher and satirist on the apostate bishop Miler Magrath; The Most Reverend Patrick...
Another 26 words (2 lines of text) are included under the topic Early Diffee Notables in all our PDF Extended History products and printed products wherever possible.


United States Diffee migration to the United States +

In the 19th century, thousands of Irish left their English-occupied homeland for North America. Like most new world settlers, the Irish initially settled on the eastern shores of the continent but began to move westward with the promise of owning land. The height of this Irish migration came during the Great Potato Famine of the late 1840s. With apparently nothing to lose, Irish people left on ships bound for North America and Australia. Unfortunately a great many of these passengers lost their lives - the only thing many had left - to disease, starvation, and accidents during the long and dangerous journey. Those who did safely arrive in "the land of opportunities" were often used for the hard labor of building railroads, coal mines, bridges, and canals. The Irish were critical to the quick development of the infrastructure of the United States and Canada. Passenger and immigration lists indicate that members of the Diffee family came to North America quite early:

Diffee Settlers in United States in the 20th Century
  • Toney Diffee, aged 28, who immigrated to America, in 1924

Contemporary Notables of the name Diffee (post 1700) +

  • Andrew Diffee, American director and editor
  • Matthew "Matt" Diffee, American cartoonist from Denton, Texas whose works appear in the New Yorker magazine


  1. MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)
  2. O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)
  3. MacLysaght, Edward, Irish Families Their Names, Arms and Origins 4th Edition. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-2364-7)


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