Family name Eguia (Egia , Eguia , Егиа ) , in the world, is a common cognomen. The surname Eguia is habitual in Philippines, where it is quite a rare surname, Mexico, and Uruguay. Not in comparison with a country's population, this name is the most popular in Philippines, Mexico, and Argentina. Much less frequently, Eguia is the forename as well as the last name.