The vast majority of the Donauschwaben settlers in Hrastovac and surrounding area came after 1865 from the counties of Tolna, Baranya and Somogy, known as the Swabian Turkey. Here is some information on that area: 

Swabian Turkey History

Austro-Hungary's_Population_Distributions_in_1910

Researching in Swabian Turkey by  Henry Fischer:   

     http://geocities.com/childrenofdanube/html/genealogy.html

Researching in Swabian Turkey by Wally Schlegel 

Early_Lutheran_Church_In_Swabian_Turkey

  Hungarian 1715 Census 

Marriage Index of the Lutheran Parish in Pressburg starting at 1688:

     http://www.gschweng.de/Trauindex-Pressburg.htm

Books on Heidebauern

Heidebauern-Communities

  Villages in Hungarian 1828 Census

      http://www.iabsi.com/gen/public/Documents/1828%20Census.doc

Swabian_Turkey_Trachten

 CHILDREN OF THE DANUBE
     By Henry Fischer: http://geocities.com/childrenofdanube

Hungarian Maps 1910: http://lazarus.elte.hu/hun/maps/1910/

  Hungarian Counties Map 1913 

      http://www.talmamedia.com/map/hhcounty/hhcounty.htm

 BARANYA RESEARCH

  SOMOGY RESEARCH

  TOLNA RESEARCH

  Most of our Hrastovac ancestors came originally from Hesse down the River Danube to the Swabian Turkey areas. See: Hessian Emigration

  Ellis Island Swabian Turkey Records