Cognomen หิรัญ (Hiran 
, หิรัญ , Heraman 
) , in the entire world, is quite a common last name. The last name หิรัญ is characteristic of Sri Lanka, where it is quite a rare surname, Thailand, and Oman. Measured by absolute frequency, it most frequently occurs in India, Thailand, and Sri Lanka. More prevalently, หิรัญ is the forename as well as the last name.