Family name Yso (Исо 
, Yso 
) , all over the world, is quite a rare surname. The last name Yso is characteristic of Myanmar, where it is quite a rare surname, Kyrgyzstan, where it is a rare surname, and Egypt. Not in comparison with a country's population, it is commonest in Myanmar, Egypt, and Philippines. Also, Yso is the forename as well as the last name.