Family name Aichai (爱钗 
, Aichai 
) , all around the world, is a rare cognomen. The family name Aichai is characteristic of China, where it is a very rare surname, Thailand, where it is an extremely rare surname, and Spain. Measured by absolute frequency, it most frequently occurs in China, Thailand, and India. More frequently, Aichai is the forename as well as the last name.