Last name Растіслав (Rastislav 
, Растіслав 
) , in the world, is a rare surname. The surname Растіслав is characteristic of Slovakia, where it is quite a rare surname, Slovenia, where it is a rare surname, and Hungary. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Slovakia, Romania, and Hungary. Predominantly, Растіслав is the forename as well as the last name.