Last name Kayuki (Kayuki 
) , across the world, is a rare cognomen. The family name Kayuki is habitual in Tanzania, where it is quite a rare surname, Uganda, where it is a rare surname, and Chile, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Tanzania, Uganda, and the United Kingdom. Very seldom, Kayuki is the forename as well as the last name.