Last name Исая (Isaya 
, Исая 
, Isaija 
) , across the world, is a common cognomen. The family name Исая is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is quite a common surname, Kenya, where it is a rare surname, and Zimbabwe. In absolute terms, it most frequently occurs in Tanzania, Nigeria, and India. More frequently, Исая is the forename as well as the last name.