Doy History, Family Crest & Coats of Arms

The original Gaelic form of Doy was O Dubhthaigh. The first portion of the name is the word "dubh," which means "black," while the second portion is likely an obsolete Irish forename. 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." [1] O'Duffy was listed as one of these such families.

Early Origins of the Doy family

The surname Doy 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." [2]

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. [2]

The Monaghan branch of the family were principally found in Attyduffy or Attyduff [1] and "modern statistics show that it is now most numerous name in Co. Monaghan." [3]

Early History of the Doy family

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

Doy Spelling Variations

Before widespread literacy came to Ireland, a name was often recorded under several different variations during the life of its bearer. Accordingly, numerous spelling variations were revealed in the search for the origin of the name Doy family name. Variations found include Duffey, Duff, Duffy, O'Duffey, O'Duffy, Duffe, O'Duffe, Doey, Dohey, Doohey, O'Dowey and many more.

Early Notables of the Doy family (pre 1700)

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 Doy Notables in all our PDF Extended History products and printed products wherever possible.


Australia Doy migration to Australia +

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

Doy Settlers in Australia in the 19th Century
  • Mr. William Doy, English convict who was convicted in Norfolk, Norfolkshire, England for 7 years, transported aboard the "Augusta Jessie" on 27 September 1834, arriving in Tasmania (Van Diemen's Land) [4]


  1. ^ O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)
  2. ^ MacLysaght, Edward, Irish Families Their Names, Arms and Origins 4th Edition. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-2364-7)
  3. ^ MacLysaght, Edward, The Surnames of Ireland. Ireland: Irish Academic Press, sixth edition, 1985. Print. (ISBN 0-7165-2366-3)
  4. ^ Convict Records Voyages to Australia (Retrieved 14th August 2020). Retrieved from https://convictrecords.com.au/ships/augusta-jessie


Houseofnames.com on Facebook