Surname Дои (Toshitake 
, Toshisuke , Doi 
, and others...) , worldwide, is a common last name. The cognomen Дои is habitual in Myanmar, where it is quite a common surname, Malaysia, where it is quite a rare surname, and Japan. In absolute terms, it is commonest in Myanmar, Japan, and India. More prevalently, Дои is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Toshitake | Brazil, Singapore, China, United States, Japan |
| Toshisuke | Brazil, United States, Japan |
| Doi | Brazil, Myanmar, India, United States, Japan |
| Toshitsune | Germany, United States, Japan |
| Toshitomo | Brazil, France, Japan |
| Toshisato | Japan |
| Дои | Russia |