Surname Dieta (Dieta 
, Diet 
, Diete 
) , all over the world, is quite a common last name. The family name Dieta is characteristic of Western Europe, particularly France, where it is quite a rare surname, Switzerland, and Belgium. Not in comparison with a country's population, this name is the most popular in France, Germany, and Philippines. Also, Dieta is the forename as well as the last name.