Family name Yesai (Yesai 
, Есаи 
) , across the world, is a rare surname. The cognomen Yesai is habitual in Armenia, where it is quite a common surname, Myanmar, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Armenia, Myanmar, and China. Very seldom, Yesai is the forename as well as the last name.