Cognomen Hyo-Sook (Hyo-Sook 
) , globally, is an extremely rare last name. Much more prevalently, Hyo-Sook is the forename as well as the last name. Parts of the name also exists independently as a first name Hyo, and a first name Sook.
| VARIANT | COUNTRY |
|---|---|
| Hyo-Sook | Germany, United States |