Cognomen Dedde (Dedde 
) , in all the world, is a rare surname. The surname Dedde is characteristic of Mauritania, where it is quite a rare surname, France, where it is a rare surname, and Portugal, where it is a very rare surname. Not in comparison with a country's population, it is commonest in France, Mauritania, and Indonesia. Also, Dedde is the forename as well as the last name.