Last name Agatho (Агафон 
, Agatho 
, アガト 
) , across the world, is a rare cognomen. The family name Agatho is habitual in Tanzania, where it is a very rare surname, Greece, and Japan. Measured by absolute frequency, it is the most numerous in Indonesia, Japan, and Tanzania. Also, Agatho is the forename as well as the last name.