Family name เอ๋ย (Oei 
, Aiey 
, เอ๋ย) , in the world, is a common surname. The surname เอ๋ย is habitual in Bermuda, where it is quite a common surname, Singapore, where it is quite a rare surname, and Indonesia. Measured by absolute frequency, it is the most numerous in Indonesia, the United States, and Netherlands. Also, เอ๋ย is the forename as well as the last name.