Surname 葛宇 (葛宇 
) , in all the world, is a very rare cognomen. The last name 葛宇 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 葛宇 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 葛宇 | China |