Cognomen يوكو (Yoko 
, Yuko 
, Yuuko 
, among others...) , around the globe, is a common surname. The family name يوكو is habitual in Sub-Saharan Africa, particularly Gabon, where it is quite a rare surname, Liberia, and the Democratic Republic of the Congo. Measured by absolute frequency, the name is most common in Indonesia, the Democratic Republic of the Congo, and Japan. More prevalently, يوكو is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yoko | Japan, Indonesia, United States, Brazil, Democratic Republic of the Congo |
| Yuko | Japan, China, Indonesia, United States, Brazil |
| Yuuko | Japan, Malaysia, Mexico, United States, Brazil |
| يوكو | Sudan |