Family name หล่อง (Long 
, หล่อง) , around the world, is a widespread cognomen. The cognomen หล่อง is characteristic of Macao, where it is a common surname, Malaysia, and Cayman Islands (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in China, the United States, and Malaysia. Much less frequently, หล่อง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Long | Vietnam, United Kingdom, United States, Malaysia, China |