>
Cognomen Calko (Calko
, Цалко
) , globally, is quite a rare last name. The family name Calko is characteristic of Belarus, where it is quite a common surname, Ukraine, where it is quite a rare surname, and Latvia. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Belarus, Ukraine, and Russia. Very seldom, Calko is the forename as well as the last name.