Here's basically all I know about Hestas in Carpathian mythology.
A CARPATHIAN MYTH: Nikatjef
In Carpathian mythology, a tribe of insects known as the Lakin was responsible for order and organization in the world while a band of menacing goblins known as the Hestas were constantly working to create disorder and destructiveness. The evil Hestas would prey upon the eggs of the Lakin in an effort to eliminate them because once the eggs hatched, the insects were too powerful a match for the Hestas. A sprite-like creature called Nikatjef was named guardian of the eggs in this battle for balance and harmony.
Very little exists on the web concerning Carpathian mythos. What few references to Carpathian, or Carpatho, are few and do not describe much of their history. One good site I found recently The Carpatho-Rusyn Site did provide some insight into early Christianity and Orthodox movements. The Carpathian basin is based mostly in the Ukraine, covering the Carpathian Mountains, and also into a good portion of Romania, putting it failry close to Transylvania on the maps. As I learn more, I will do my best to provide links and information.