Cognomen Trilo (Trillo 
, Trill 
, Trilo 
) , in all the world, is a common surname. The cognomen Trilo is habitual in Latin America and the Caribbean, particularly Peru, where it is quite a common surname, Argentina, where it is quite a rare surname, and Uruguay. Measured by absolute frequency, it is commonest in Peru, Mexico, and Spain. Much less frequently, Trilo is the forename as well as the last name.