Surname ใจสิทธิ์ (Jaisit 
, ใจสิทธิ์ ) , all over the world, is a rare cognomen. The last name ใจสิทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ใจสิทธิ์ is the forename as well as the last name.