Surname Ратои (Ratoi 
, Ратои 
) , all over the world, is quite a rare cognomen. The cognomen Ратои is habitual in Romania, where it is quite a rare surname, Moldova, and Greece, where it is a rare surname. In absolute terms, it is commonest in Romania, Moldova, and Spain. Very seldom, Ратои is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ratoi | Romania, Italy, Spain, Moldova, Tanzania |
| Ратои | Russia |