Dagen History, Family Crest & Coats of Arms
The ancient Gaelic form of the Irish name Dagen 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 Dagen family
The surname Dagen 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 Dagen family
This web page shows only a small excerpt of our Dagen research. Another 155 words (11 lines of text) covering the years 1327, 1813, 1896, 1813, 1896, 1823 and 1884 are included under the topic Early Dagen History in all our PDF Extended History products and printed products wherever possible.
Dagen Spelling Variations
In the Middle Ages, a name was often recorded under several different spelling variations during the life of its bearer. Literacy was rare at that time and none of the languages to be found in the British Isles had achieved any great semblance of standardization. Variations of the name Dagen found include Dugan, Duggan, O'Duggan, Dougan, Douggan, Dewgan, Deugan and many more.
Early Notables of the Dagen family (pre 1700)
Another 29 words (2 lines of text) are included under the topic Early Dagen Notables in all our PDF Extended History products and printed products wherever possible.
Ireland experienced a dramatic decrease in its population during the late 19th century. This was in a great measure, a response to England's imperialistic policies. Hunger and disease took the lives of many Irish people and many more chose to leave their homeland to escape such hunger and disease. North America with its promise of work, freedom, and land was an extremely popular destination for Irish families. For those families that survived the journey, all three of these things were were often attained through much hard work and perseverance. Research into early immigration and passenger lists revealed many immigrants bearing the name Dagen:
Dagen Settlers in United States in the 18th Century
Dagen Settlers in United States in the 19th Century