No YOU tell me @CuriousaboutSamphire , seeing as you've made the statement. Looking it up won't produce information that doesn't exist. So I'll ask again - which countries did Ireland colonise? That's not a problem. It has been posted before, it made lots of headline after Frances Fitzgerald made her statement that Ireland has never invaded any other land, never sought to enslave or occupy
You only have to look at Wales to see some very Irish names.
Parts of Canada during the American Civil War. That one was on TV a short while ago, how the French, English and Irish fucked up taking Canada. Colonies of all were left behind.
Ireland colonised way before the diaspora. Scotland, Wales, many parts of Europe. Almost all of the great warrior kings acted like Vikings, they went out and took lands to colonise, to survive. They were prized and feared warriors as well as farmers.