Skip to main content

Courcy, John de

Courcy, John de (d. 1219). Conqueror of Ulster. De Courcy's parentage is unknown, though he probably came from Somerset. He is said to have visited Ireland in 1171 with Henry II, who promised him Ulster if he could acquire it. Returning in 1176 with a small but well-organized force, he moved north from Dublin and succeeded in gaining the lands east of the Bann. He established a castle and base at Carrickfergus, built other strong points, and strengthened his position in 1180 by a marriage to Affreca, daughter of Gottred, king of Man. From 1185 to 1190 he was justiciar in Ireland. But he had great difficulty in holding his conquests, both against the native Irish and against Hugh de Lacey, a rival Norman colonizer, who was created earl of Ulster by King John in 1205.

J. A. Cannon

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Courcy, John de." The Oxford Companion to British History. . 23 Feb. 2019 <>.

"Courcy, John de." The Oxford Companion to British History. . (February 23, 2019).

"Courcy, John de." The Oxford Companion to British History. . Retrieved February 23, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.