Last name Pustelnikas (Pustelnikas 
) , around the world, is a very rare cognomen. The family name Pustelnikas is habitual in Lithuania, where it is a rare surname, Brazil, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, it is the most numerous in Lithuania, Brazil, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Pustelnikas | Lithuania, Brazil, United Kingdom, United States |