Surname Райнаи (Rajnai 
, Райнаи 
) , globally, is quite a rare cognomen. The cognomen Райнаи is habitual in Hungary, where it is quite a common surname, Germany, where it is a very rare surname, and Canada. Not in comparison with a country's population, the name is most common in Hungary, Germany, and the United States. Much less frequently, Райнаи is the forename as well as the last name.