Family name Ardavicius (Ardavicius 
) , in the entire world, is a very rare last name. The cognomen Ardavicius is habitual in Lithuania, where it is quite a rare surname, the United Kingdom, where it is an extremely rare surname, and Canada. Not in comparison with a country's population, it is the most numerous in Lithuania, the United Kingdom, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Ardavicius | Brazil, Canada, Lithuania, United Kingdom |