Family name Авенданьо (Avendaño 
, Авенданьо 
) , across the world, is a widespread last name. The last name Авенданьо is habitual in Latin America and the Caribbean, particularly Costa Rica, where it is quite a common surname, Chile, and Mexico (explore the name in all countries). In absolute terms, it is the most numerous in Latin America and the Caribbean, particularly Mexico, Colombia, and Argentina.