Family name อินทสาร (Inthasan 
, อินทสาร , Inthasarn ) , across the world, is a rare last name. The cognomen อินทสาร is characteristic of Laos, where it is quite a rare surname, Thailand, where it is a rare surname, and Australia, where it is a very rare surname. Much less frequently, อินทสาร is the forename as well as the last name.