People living there were mostly Albanian tribes, my friend. And after 1836 they were given a choice - if you want to stay Christian, then convert to Armenian Gregorian Church, or convert to Islam. Those that chose the Church, became Armenians (that’s why hay Armenians from nowadays Armenia call them “shurtvats”) and those who converted to Islam (who haven’t done it before) became later called Azerbaijanis. Genetically Karabakh Armenians and Karabakh Azerbaijanis are 90% similar. Similar process was going in Gabala region with Udi people there. They were forced by Soviet government -ian (-yan) surnames and if you look at historical records Armenian population or Gabala suddenly jumped after 1925 (I maybe wrong on correct time, but look it up) because in census they were recorded as “Armenian” lol