Last name Коида (Koyda 
, Koida 
, 肥田 ) , across the world, is a rare cognomen. The surname Коида is habitual in Germany, where it is a very rare surname, Indonesia, and Russia. Not in comparison with a country's population, it most frequently occurs in Germany, Indonesia, and the United States. Much less frequently, Коида is the forename as well as the last name.