Deighan History, Family Crest & Coats of Arms
- Origins Available:
The ancient Gaelic form of the Irish name Deighan was O Dubhaigan. The first portion of the name is the word dubh, which means black; the second portion is likely some obsolete Irish personal name.
Early Origins of the Deighan family
The surname Deighan was first found in County Clare (Irish: An Clár) located on the west coast of Ireland in the province of Munster, where O'DuilAgin, O'Dugan, (or O'Deegan), chief of Muintir ConIochta, a district in the parish of Tomgraney, in the barony of Tullagh.
The family line is directly traceable to Fergus Mor (Fergus the Great). In turn his ancestry is associated with King Ir, brother of the equally famous Heremon. The name was first found near what is now the town of Fermoy, in the territory formerly known as Roche's Country. This territory encompassed the junction of the counties Cork, Tipperary and Waterford. In modern times, the surname is generally found in these three counties.
However, there was another O'Dugan sept in the territory called Ui Maine, also called Hy Many, which spans eastern county Galway and southern county Roscommon. This sept gave their name to the place called Ballyduggan, near Loughrea. 
Early History of the Deighan family
This web page shows only a small excerpt of our Deighan research. Another 155 words (11 lines of text) covering the years 1327, 1813, 1823, 1884 and 1896 are included under the topic Early Deighan History in all our PDF Extended History products and printed products wherever possible.
Deighan Spelling Variations
The recording of names in Ireland in the Middle Ages was an inconsistent endeavor at best due to competing dialects and languages, and the general illiteracy of the population. Research into the name Deighan revealed many spelling variations, including Dugan, Duggan, O'Duggan, Dougan, Douggan, Dewgan, Deugan and many more.
Early Notables of the Deighan family
Another 29 words (2 lines of text) are included under the topic Early Deighan Notables in all our PDF Extended History products and printed products wherever possible.
| Deighan migration to the United States
During the middle of the 19th century, Irish families often experienced extreme poverty and racial discrimination in their own homeland under English rule. Record numbers died of disease and starvation, and many others, deciding against such a fate, boarded ships bound for North America. The largest influx of Irish settlers occurred with Great Potato Famine of the late 1840s. Unfortunately, many of those Irish that arrived in Canada or the United States still experienced economic and racial discrimination. Although often maligned, these Irish people were essential to the rapid development of these countries because they provided the cheap labor required for the many canals, roads, railways, and other projects required for strong national infrastructures. Eventually the Irish went on to make contributions in the less backbreaking and more intellectual arenas of commerce, education, and the arts. Research early immigration and passenger lists revealed many early immigrants bearing the name Deighan:
Deighan Settlers in United States in the 19th Century
- Joseph Deighan, who landed in New York, NY in 1816 
|Contemporary Notables of the name Deighan (post 1700)
- John Deighan (b. 1982), Irish Gaelic footballer
- Gregory "Greg" J. Deighan, Canadian politician, Speaker of the Legislative Assembly of Prince Edward Island (1996-2007)
- MacLysaght, Edward, Irish Families Their Names, Arms and Origins 4th Edition. Dublin: Irish Academic, 1982. Print. (ISBN 0-7165-2364-7)
- 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)