Last name Rehat (Rahat 
, راحة 
, Rehat 
) , throughout the world, is a common cognomen. The family name Rehat is habitual in Bangladesh, where it is quite a common surname, Oman, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it is commonest in Southern Asia, particularly Bangladesh, Pakistan, and India. More prevalently, Rehat is the forename as well as the last name.