Surname Мамайев (Мамайев 
, Mamajev 
) , around the world, is a very rare cognomen. The family name Мамайев is habitual in Lithuania, where it is quite a rare surname, Estonia, where it is a rare surname, and Kyrgyzstan, where it is a very rare surname. Measured by absolute frequency, it is commonest in Lithuania, Estonia, and Germany.