Last name Gyeni (Gyeni 
) , worldwide, is a rare surname. The cognomen Gyeni is characteristic of Ghana, where it is quite a rare surname, the United Kingdom, where it is a very rare surname, and South Africa, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Ghana, the United Kingdom, and India. Much less frequently, Gyeni is the forename as well as the last name.