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