Cognomen Ласку (Lascoux 
, Ласку 
) , worldwide, is a rare surname. The surname Ласку is characteristic of France, where it is quite a rare surname, Canada, where it is an extremely rare surname, and Ukraine. Not in comparison with a country's population, this name is the most popular in France, the United States, and Canada. Much less frequently, Ласку is the forename as well as the last name.