Last name אהו (Aho 
, אהו 
) , all over the world, is a common cognomen. The family name אהו is characteristic of Finland, where it is a common surname, Japan, where it is quite a common surname, and Estonia, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Japan, Finland, and the United States. Much less frequently, אהו is the forename as well as the last name.