Last name Лацо (Laco 
, Лацо 
) , throughout the world, is quite a rare surname. The cognomen Лацо is characteristic of Slovakia, where it is quite a common surname, Croatia, where it is quite a rare surname, and Bosnia and Herzegovina. Not in comparison with a country's population, it is the most numerous in Philippines, Slovakia, and Croatia. Also, Лацо is the forename as well as the last name.