Last name Коё (Koyo 
, Коё) , in the world, is quite a common family name. The surname Коё is characteristic of Lesotho, where it is quite a rare surname, the Democratic Republic of the Congo, and Morocco. Measured by absolute frequency, it is the most numerous in the Democratic Republic of the Congo, Indonesia, and Morocco. Also, Коё is the forename as well as the last name.