Seamus McBundy was an ancestor of Al Bundy, who lived in the village of Lower Uncton in England. He repeatedly insulted the village witch* Poxilda (Helena Carroll), who cursed the village so that no sunlight would fall on the village until someone was able to break the curse, which happened to be Al. Prior to the Bundys' visit to England, which they were able to make thanks to an invitation by the local townspeople in Lower Uncton, and its Upper Uncton neighbors, the only known way to remove the curse is to kill all his male descendants, leading to the locals' attempted murder of the Bundy men, which was the ulterior motive of the invite! Al is able to break the curse by winning a "joust", of sorts (where he's decked out in his Polk High football uniform, accompanied by a shield that reads "Kill Al Bundy") with a fellow named Igor, who was the great-great-great-great grandson of the village witch.
Like Al, he sells shoes and is rude to fat women. He was a great athlete is his youth, whom he remarks he would have gone pro had he not married.
- as Al often does to the women who come to his shoe store