Cognomen Longh (Longh 
) , globally, is a very rare family name. The cognomen Longh is habitual in Malaysia, where it is a very rare surname, Venezuela, and Nigeria, where it is an extremely rare surname. In absolute terms, this name is the most popular in Malaysia, Nigeria, and India. Likewise, Longh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Longh | India, Venezuela, Malaysia, United States, Nigeria |