Aside from 6 letters in the same order, Ireland and Iceland also share something else in common: mitochondrial DNA (mDNA). mDNA is the kind of DNA you get from your mother. It, in fact, is handed down daughter to daughter, generation after generation. What is interesting about Iceland is that even though it is assuredly Scandinavian, a good share of its mDNA is closely related to women who lived in Ireland thousands of years ago.
How is this possible? you ask. Space aliens? While space aliens would be a very satisfying answer, scholars speculate that the real answer is much more earthy: rape and pillage. You see for centuries Vikings terrorized the British isles, storming in and stealing goods and women. When settling Iceland randy and wifeless Norwegians took a nip into Ireland and stole some them some wives. Ipso facto.