I'm not very familiar with UK newspapers, but I did find a couple of sites:http://www.britishnewspaperarchive.co.uk/http://www.gazettes-online.co.uk
I don't have access to the Irish newspapers at ancestry.com. You could try another message at the Ireland board:http://boards.ancestry.com/localities.britisles.ireland/mb.a...
You could also try posting at the Newspapers in Ireland board to find out what's available online:http://boards.ancestry.com/topics.news.ireland/mb.ashx
Given their common names, however, you'll need to find specific info on where and when they passed away in order to get meaningful results.