Surname Izyaslav (Изяслав 
, Izyaslav 
, Ізяслав ) , around the world, is a very rare last name. The last name Izyaslav is habitual in Israel, where it is a rare surname, and the United States, where it is an extremely rare surname. More frequently, Izyaslav is the forename as well as the last name.