Family name อยู่ (Yu 
, Are 
, Stay 
) , around the globe, is a prevalent cognomen. The family name อยู่ is characteristic of Mongolia, where it is a prevalent surname, Cayman Islands, where it is a widespread surname, and Hong Kong (explore the name in all countries). Not in comparison with a country's population, the name is most common in China, Mongolia, and Myanmar. Much less frequently, อยู่ is the forename as well as the last name.