Surname Nyanko (Nyanko 
, Нянько 
) , in the entire world, is a rare last name. The cognomen Nyanko is characteristic of Ghana, where it is a rare surname, Ukraine, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Ukraine, Ghana, and Nigeria. Very seldom, Nyanko is the forename as well as the last name.