MIRROR.CO.UK - Iceland has fewer than 400K people and little immigration over the years. To resolve the issue of Icelanders awkwardly finding out they are distant relations while dating, one company developed a practical mobile app called Íslendinga-App, also known as The Book of Icelanders that lists in great detail every Icelander since they first arrived on the island in the 9th century and the ways in which they could all be related. All users have to do is type in a name to see the results of how related one person is to another.