Surname Guydo (Guydo 
, Гуидо 
, Гуйдо 
) , in all the world, is a rare family name. The family name Guydo is characteristic of Belarus, where it is quite a rare surname, Georgia, where it is a rare surname, and Ukraine, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Belarus, Russia, and Ukraine. Very seldom, Guydo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guydo | Brazil, Peru, United States, Mexico |
| Гуидо | Russia |
| Гуйдо | Ukraine, Kazakhstan, Belarus, Russia, Georgia |