Surname Saihan (Saihan 
, Сайхан 
, Саихан ) , around the world, is quite a rare cognomen. The last name Saihan is characteristic of Mongolia, where it is quite a rare surname, Bangladesh, where it is a rare surname, and Malaysia. In absolute terms, it is the most numerous in India, Bangladesh, and Mongolia. More prevalently, Saihan is the forename as well as the last name.