Gypsy Melodies

When I was a child during the 1950 and listened to the radio there was a radio station that played what they called “Gypsy Melodies” it was something like a cross between Classical music and Bluegrass.

Think of Spanish guitar only for the violin.  I liked it then. It hauled ass. Now I am at a loss to hunt down the genre other than Slavic folk music?

 Any ideas?