The historical names of many officials in the Ottoman Empire reveal their origin (Hirwat = Hrvat or Horvat, which is a Croatian name for Croat): Veli Mahmud Pasha (Mahmut Pasha Hirwat), Rüstem Pasha (Rustem Pasha Hrvat – Opuković), Piyale Pasha (Pijali Pasha Hrvat), Memi Pasha Hrvat, Tahvil Pasha Kulenović Hrvat etc. There was some considerable confusion over the terms "Croat" and "Serb" in these times, and "Croat" in some of these cases could mean anyone from the wider South Slavic area.[10]