Across the world, Ейде (Eide 
, Ейде 
, Smith-Simonsen ) is a rare unisex first name. The first name Ейде is characteristic of Israel, where it is a rare predominantly boy's, but scarcely female name, Brazil, where it is a rare unisex name, and Sweden, where it is a rare male name. Not in comparison with a country's population, the name is most common in Brazil, Israel, and Nigeria. More frequently, Ейде is the last name as well as the forename.