Surname Чангхаи (Changhai 
, Чангхаи 
, Changkhai 
) , globally, is a very rare cognomen. The cognomen Чангхаи is habitual in Spain, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Thailand. Not in comparison with a country's population, the name is most common in China, Spain, and Thailand. Much more prevalently, Чангхаи is the forename as well as the last name.