Cognomen Lapun (Lapun 
) , in all the world, is a rare last name. The surname Lapun is habitual in Papua New Guinea, where it is quite a rare surname, Thailand, where it is a very rare surname, and Argentina. In absolute terms, it is the most numerous in Papua New Guinea, Indonesia, and Thailand. Much less frequently, Lapun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lapun | Indonesia, Papua New Guinea, Poland, Argentina, Thailand |
| paul lapun Papua New Guinea politician, PG (b. 1923) |
|