The Act of Union came into effect on 1 January 1801 and created the United Kingdom of Great Britain and Ireland. Various efforts at repealing the act occurred both within and outside Ireland. Those who were of this mindset became known as repealers and many Repeal Associations were established in the United States and Canada. One such example was in Prince Edward Island (PEI), Canada in the 1840s.
In the 1980s, Terrence M. Punch (more about him in a recent blog post) wrote in The Island Magazine about finding newspaper articles from 1843 that listed the names of Irish repelaers in PEI. Importantly, an Irish place of birth was also provided for many of the men. The newspaper in questions was the Halifax-based Register and the lists of names were published in various editions from October and November of that year.
Punch's first publication provides the names of 149 men and over 100 Irish places of birth. His second lists 253 men with the majority of names also having an Irish birthplace provided. You can access both publications on the website of the University of Prince Edward Island, as they have digitized old editions of The Island Magazine, or click the links below.
 Punch, Terrence M. A Prince Edward Island Repeal List for 1843. The Island Magazine. 1986, no. 20 Fall Winter. pp. 29-31. Available online at http://vre2.upei.ca/islandmagazine/fedora/repository/vre%3Aislemag-batch2-266: accessed 31 January 2016.
 Punch, Terrence M. A Prince Edward Island Repeal List for 1843. The Island Magazine. 1987, no. 21 Spring Summer. pp. 33-36. Available online at http://vre2.upei.ca/islandmagazine/fedora/repository/vre%3Aislemag-batch2-281: accessed 31 January 2016.