Cognomen Leonas (לאון 
, Leonas 
, Леонас 
) , around the world, is a rare family name. The cognomen Leonas is characteristic of Andorra, where it is quite a rare surname, Lithuania, and Israel. Not in comparison with a country's population, the name is most common in Israel, Romania, and Lithuania. Also, Leonas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| לאון | Israel |
| Leonas | United States, Romania, Lithuania, Israel, Colombia |
| Леонас | Ukraine, Russia, Kazakhstan |
|
silvestras leonas Lithuanian military officer, LT (b. 1894) |
|
| algirdas leonas (1904-1983) (b. 1904) |
|
|
| česlovas leonas LT (b. 1932) |
|