Cognomen 伊加 (伊加 
, Eagar 
) , worldwide, is quite a rare family name. The cognomen 伊加 is characteristic of New Zealand, where it is a rare surname, Australia, and South Africa. Measured by absolute frequency, it is commonest in the United States, South Africa, and Australia. Very seldom, 伊加 is the forename as well as the last name.