Surname Ravnak (Ravnak 
) , all over the world, is a rare cognomen. The surname Ravnak is characteristic of Slovenia, where it is quite a rare surname, Croatia, where it is a rare surname, and India, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in India, Slovenia, and Germany. Much less frequently, Ravnak is the forename as well as the last name.