Cognomen 長孫 (長孫 
) , across the world, is a very rare last name. The last name 長孫 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| 長孫 | China |
|
長孫無忌 Chinese politician of the Tang dynasty (594-659), CN (b. 594) |
|