Family name Luận (Luận 
) , all over the world, is quite a rare last name. The cognomen Luận is characteristic of South-eastern Asia, particularly Vietnam, where it is quite a rare surname. Much less frequently, Luận is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Luận | Vietnam, United States |
|
phạm vũ luận Vietnamese economist and politician, VN (b. 1955) |
|
| trịnh công luận Paralympic discus thrower, VN (b. 1972) |
|