I live in Slovenia, on the border with Italy. We are the only family named Ferlat in Slovenia. My grandfather Boris Ferlat (born 30.05.1922) had a son (Bojan) and a daughter (Mojca), but my father had only two girls, my sister (Natasa) and I.
My grandfather did some research about our surname and it seems that it is originary from the Flandres in Belgium. The flemish form of the name seems to be Verlaat or Verlat.Our ancestors have moved here during Napoleon era, as solders.
There is another family Ferlat living in Italy, very close to this area, near Triest.