Family name Injan (Injan 
, อินจัน ) , worldwide, is quite a rare last name. The last name Injan is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, Malaysia, where it is a rare surname, and Philippines, where it is a very rare surname. Measured by absolute frequency, it is commonest in Thailand, India, and Malaysia. Likewise, Injan is the forename as well as the last name.