Last name Ларко (Larco 
, Ларко 
) , throughout the world, is quite a rare cognomen. The last name Ларко is characteristic of Latin America and the Caribbean, particularly Peru, where it is quite a rare surname, Ecuador, and Chile, where it is a rare surname. In absolute terms, it is commonest in Peru, the United States, and Ecuador. Much less frequently, Ларко is the forename as well as the last name.