Family name Sengan (Sengan 
, เซ่งอั้น) , in the world, is a rare cognomen. The surname Sengan is characteristic of South-eastern Asia, particularly Malaysia, where it is a rare surname, Singapore, where it is a very rare surname, and Indonesia. Measured by absolute frequency, the name is most common in Malaysia, Indonesia, and India. Likewise, Sengan is the forename as well as the last name.