I had to post this here, since it is about bacon and I am all about the proliferation of this thread and its bacon-y goodness....
When I was doing my quickie search on traditional Irish foods, teh Wikipedias suggested that it would be more likely to be
Bacon and Cabbage in the pot, rather than corned beef, which was typically saved for royalty and the well-to-do.
The History of Corned Beef