There is one thing which spoils the usefulness of the genealogies but which makes them perhaps more interesting still for enthusiasts; namely, the Icelandic genealogies are not always put together correctly. Matters can be complicated in the case of illegitimate children, foster-children or where the identity of the father is mistaken.
One can see reflections of such complications in contemporary Icelandic society. In comparison with other countries, there are proportionally less children born in wedlock. It is more common for parents to be registered as unmarried cohabitants, living together but unmarried. The percentage of single parents is rather high in Iceland and similar to other Scandinavian nations. Also, the number of separations is quite high in Iceland. This means, amongst other things, that many Icelandic families are made up of people living together who, as well as having children of their own, raise children from former marriages.
Icelanders have children at a younger age than in neighbouring countries and it is common for students to have one and even two children.
Names of Icelanders