Cognomen Iwato (Iwato 
, Ивато 
) , around the globe, is a very rare family name. The surname Iwato is habitual in Tanzania, where it is a very rare surname, Australia, and Brazil, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Tanzania, Brazil, and Russia. More frequently, Iwato is the forename as well as the last name.