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