Family name Yukuko (Yukuko 
) , in all the world, is an extremely rare cognomen. Predominantly, Yukuko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yukuko | United States, Japan, Brazil |
Masuda, Suzuki, Takada, Tejima, Wakita, Predergast, Tokimatsu, Fukunaga, and Prendergast