Family name کیارش (Kiarash 
, کیارش ) , worldwide, is a rare cognomen. The last name کیارش is characteristic of Romania, where it is a rare surname, Iran, where it is a very rare surname, and Canada. Not in comparison with a country's population, it is commonest in Iran, the United States, and Romania. More frequently, کیارش is the forename as well as the last name.