Cognomen Мутаи (Mutai 
, Мутаи 
) , in the world, is a common family name. The family name Мутаи is characteristic of Kenya, where it is quite a common surname, Japan, where it is quite a rare surname, and Uganda, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Kenya, Japan, and India. Much less frequently, Мутаи is the forename as well as the last name.