Cognomen Rstm (رستم 
, Rstm 
) , worldwide, is a common family name. The family name Rstm is characteristic of Western Asia, particularly Syria, where it is quite a common surname, Palestinian Territory, where it is quite a rare surname, and Lebanon. Measured by absolute frequency, it is commonest in Syria, Egypt, and Sudan. Also, Rstm is the forename as well as the last name.