Cognomen Singai (Singai 
, Сингай 
) , all over the world, is a rare family name. The surname Singai is characteristic of Singapore, where it is a rare surname, Ukraine, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in India, Ukraine, and Singapore. Also, Singai is the forename as well as the last name.