Surname บ่าย (Bai 
, Hnoon 
, บ่าย) , across the world, is a prevalent last name. The cognomen บ่าย is habitual in India, where it is a widespread surname, Cayman Islands, where it is a common surname, and China, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in India, China, and Pakistan.