Last name Lethman (Lethman 
) , in all the world, is an extremely rare cognomen. The surname Lethman is habitual in Costa Rica, where it is a very rare surname, and France, where it is an extremely rare surname. Much less frequently, Lethman is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lethman | Costa Rica, France, South Africa |