Last name Йирка (Jirka 
, Йирка) , in all the world, is quite a rare surname. The family name Йирка is habitual in Czechia, where it is quite a common surname, Austria, where it is quite a rare surname, and Slovakia, where it is a rare surname. In absolute terms, the name is most common in Czechia, Austria, and the United States. More frequently, Йирка is the forename as well as the last name.