Family name Aguei (Агей 
, Aguei 
) , in all the world, is a rare cognomen. The cognomen Aguei is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a very rare surname, and Kazakhstan. In absolute terms, it is the most numerous in Eastern Europe, particularly Belarus, Russia, and Ukraine. Also, Aguei is the forename as well as the last name.