 The Kosačas themselves, however, were one of the few non-Orthodox noble families in Hum.His lands were known as Herzog's lands or later Herzegovina.King Stjepan Tomaš of Bosnia married Katarina Kosača, daughter of Stjepan Vukčić, in a Catholic ceremony in May 1446 ensuring, at least for a short while, he had the support of the most powerful nobleman in the kingdom and a staunch supporter of the Bosnian Church, Stjepan Vukčić.