Cognomen Йей (Yei 
, Йей 
) , globally, is quite a rare last name. The last name Йей is characteristic of Malaysia, where it is quite a rare surname, Myanmar, and Taiwan, where it is a rare surname. Measured by absolute frequency, it is the most numerous in South-eastern Asia, particularly Malaysia, Myanmar, and Indonesia. Likewise, Йей is the forename as well as the last name.