Last name Ыихуи (Yihui 
, Ыихуи 
) , worldwide, is a rare surname. The surname Ыихуи is habitual in Taiwan, where it is a rare surname, Singapore, and Malaysia. Not in comparison with a country's population, it is the most numerous in Taiwan, China, and Malaysia. More prevalently, Ыихуи is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yihui | Malaysia, China, Singapore, United States, Taiwan |
| Ыихуи | Russia |