Cognomen سايدو (Saido 
, سايدو) , all over the world, is quite a rare family name. The last name سايدو is characteristic of Algeria, where it is quite a rare surname, Morocco, and Iraq, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Algeria, Morocco, and Indonesia. More frequently, سايدو is the forename as well as the last name.