Around the world, Леонардус (Leonardus 
, Леонардус 
) is quite a common male first name. The first name Леонардус is characteristic of Seychelles, where it is quite a common boy's name, Indonesia, where it is quite a rare predominantly masculine, but very infrequently female name, and Netherlands, where it is quite a rare boy's name. In absolute terms, it is the most numerous in Indonesia, South Africa, and Netherlands. Much less frequently, Леонардус is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Leonardus | Germany, Indonesia, South Africa, Afghanistan, Netherlands |
| Леонардус | Russia, Ukraine |