Cognomen Сейдо (Saido 
, Сейдо 
) , all over the world, is quite a rare last name. The family name Сейдо is habitual in Algeria, where it is quite a rare surname, Morocco, and Iraq, where it is a rare surname. In absolute terms, it is the most numerous in Algeria, Morocco, and Indonesia. More frequently, Сейдо is the forename as well as the last name.