Surname Groutso (Groutso 
, Груцо 
) , across the world, is a rare cognomen. The cognomen Groutso is habitual in New Zealand, where it is a rare surname, Belarus, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Groutso | New Zealand |
| Груцо | Russia, Belarus |