All around the world, Idun (Idun 
) is quite a rare unisex first name. The first name Idun is characteristic of Norway, where it is a rare girly name, Indonesia, where it is a rare principally boy's, but scarcely feminine name, and Sweden, where it is a rare female name. Not in comparison with a country's population, it is the most numerous in India, Indonesia, and Nigeria. Likewise, Idun is the last name as well as the forename.