Family name 忠克 (忠克 
) , all over the world, is a rare last name. The family name 忠克 is habitual in Eastern Asia, particularly China, where it is a very rare surname. More prevalently, 忠克 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 忠克 | China |
| 羽生田 忠克 Japanese baseball player, JP (b. 1964) |
|