 Indeed, in the Late Middle Ages, families in Korjenići had the slava of Mratindan; among one of these families were surely the Sokolović of Foča.The Mastilović in Gacko claimed that they were formerly named Sokolović, and that they were kin with those Sokolović in Foča, with whom they share the slava, and they claimed that Mehmed-paša Sokolović was one their ancestors.A Sima Mastilović was mentioned in a document of the Piva Monastery from 1569; this points to that Sokolović was used much earlier than that.