Show ContentsO'Costagane History, Family Crest & Coats of Arms

While the Anglicized versions of Irish names are familiar to most people, many Irish names have a long and proud Gaelic heritage that is often unknown. The original Gaelic form of the name O'Costagane is Mac Oistigin which is probably derived from the pet form of the English name Roger, which is Hodgkin. 1

Early Origins of the O'Costagane family

The surname O'Costagane was first found in Leix (Irish: Laois) formerly known as Queen's County, located in central Ireland, in Leinster Province, where they held a family seat from ancient times.

The family descend through the Fitzpatrick, Princes of Ossary, line and are listed 121st in that genealogy.

"Geoffrey Baccach: his son, had a brother named Ostagan: ("osda:" Irish a host; "gan" without), a quo "Clan Ostagain," Anglicised Costigan." 2

Early History of the O'Costagane family

This web page shows only a small excerpt of our O'Costagane research. Another 49 words (4 lines of text) covering the year 1039 is included under the topic Early O'Costagane History in all our PDF Extended History products and printed products wherever possible.

O'Costagane Spelling Variations

Numerous spelling variations of the surname O'Costagane exist. A partial explanation for these variants is that ancient scribes and church officials recorded names as they were pronounced, often resulting in a single person being recorded under several different spellings. Different spellings that were found include Costigan, Costigen, Costigin, McCostigan and others.

Early Notables of the O'Costagane family

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

Migration of the O'Costagane family

Many destitute Irish families in the 18th and 19th centuries decided to leave their homeland, which had in many ways been scarred by English colonial rule. One of the most frequent destinations for these families was North America where it was possible for an Irish family to own their own parcel of land. Many of the early settlers did find land awaiting them in British North America, or even later in America, but for the majority of immigrants that arrived as a result of the Great Potato Famine of the late 1840s the ownership of land was often a long way off. These Irish people were initially put to work on such industrial projects as the building of bridges, canals, and railroads, or they worked at manufacturing positions within factories. Whenever they arrived, the Irish made enormous contributions to the infant nations of Canada and the United States. Some of the earliest immigrants to bearer the name of O'Costagane were found through extensive research of immigration and passenger lists: Michael, James, Joseph, Lawrence, Patt, Thomas (three of this name), and William Costigan, who arrived in Philadelphia, Pennsylvania between 1850 and 1870.



  1. MacLysaght, Edward, Supplement to Irish Families. Baltimore: Genealogical Book Company, 1964. Print.
  2. O'Hart, John, Irish Pedigrees 5th Edition in 2 Volumes. Baltimore: Genealogical Publishing Company, 1976. Print. (ISBN 0-8063-0737-4)


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