Surname 延明 (延明 
) , worldwide, is quite a common cognomen. The cognomen 延明 is habitual in Eastern Asia, particularly China, where it is a rare surname. More prevalently, 延明 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 延明 | China |
|
二出川 延明 Japanese baseball player, JP (b. 1901) |
|