Family name Merlu (Merlu 
, Merluza 
) , across the world, is quite a rare cognomen. The cognomen Merlu is habitual in Philippines, where it is a rare surname, France, where it is a very rare surname, and Canada. In absolute terms, the name is most common in Philippines, India, and the United States. Much less frequently, Merlu is the forename as well as the last name.