Cognomen Teiu (Teiu 
, Хаяси 
) , around the globe, is a rare surname. The cognomen Teiu is habitual in Romania, where it is quite a rare surname, Spain, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Romania, Spain, and Russia. Likewise, Teiu is the forename as well as the last name.