Surname וילקו (Vilko 
, וילקו 
) , around the globe, is a very rare family name. The cognomen וילקו is habitual in Slovenia, where it is quite a rare surname, Finland, where it is a rare surname, and Israel, where it is a very rare surname. In absolute terms, it is the most numerous in Slovenia, Finland, and the United States. More prevalently, וילקו is the forename as well as the last name.