Family name Zaeta (Zaeta 
) , in all the world, is a very rare last name. The surname Zaeta is habitual in Argentina, where it is a rare surname, Italy, where it is a very rare surname, and Spain, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Argentina, China, and Italy. Much less frequently, Zaeta is the forename as well as the last name.