Family name Trainavicius (Trainavicius 
) , all around the world, is a very rare cognomen. The cognomen Trainavicius is habitual in Lithuania, where it is quite a rare surname, Spain, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Trainavicius | Spain, Lithuania, United Kingdom |
| vaidas trainavicius LT (b. 1988) |
|