Family name Sungkyu (Sungkyu 
) , globally, is a rare cognomen. The last name Sungkyu is characteristic of South Korea, where it is a rare surname, China, where it is an extremely rare surname, and the United States. Not in comparison with a country's population, it is commonest in South Korea, China, and India. More frequently, Sungkyu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sungkyu | Japan, Australia, China, United States, South Korea |