respected

surname Kuffner not ethnically from Bosnia, and there is no connection whit church in Bosnia, I know the reason for it the same name has been written into the nearest evangelical church books in Croatian, surname Kuffner is of Czech origin,example child born in Trnjani or Prijedor were enrolled in the church books of the evangelich Lutheran church in Zagreb, also enrolled as weddings, tray to look on site

familysearch.org in croatia church records and

actapublica.eu is good czech site

KUFNER HUBERT
bože varicaka 4, banja luka

051 307612

Kufner/Kuffner is a name of german orgin and in this case then possible of germans in Bohemia or of jwes who often used german lastnames.
normally orgin would be about Kufe = skid but also some other possible:
http://de.wikipedia.org/wiki/Kufe_%28Begriffskl%C3%A4rung%29
http://translate.google.com/#en/de/skid

there also was jewish austrian-hungarian nobility with that name with orgin Břeclav (Lundenburg), South Moravia, Czech Republic. their name was changed from Koppel to Kuffner. in Vienna they owned then also the "Ottakringer Brewery". three members of the family were charged by Emperor Franz Joseph I in the hereditary nobility:
http://de.wikipedia.org/wiki/Kuffner_%28Familie%29#Ehrungen
http://de.wikipedia.org/wiki/Kuffner_%28Familie%29
http://en.wikipedia.org/wiki/Moriz_von_Kuffner
http://en.wikipedia.org/wiki/Brauerei_Ottakringer
http://en.wikipedia.org/wiki/Kuffner_Observatory
http://www.viennadirect.com/sights/kuffner.php
https://www.google.at/maps/place/Kuffner+Sternwarte/ @48.2125945,16.2911987,17z/data=!3m1!4b1!4m2!3m1!1s0x476d083d27472569:0x3e3ccdc1a5d59623
http://de.wikipedia.org/wiki/Palais_Kuffner
http://en.wikipedia.org/wiki/Palais_Kuffner

"Danube Swabians" in Bosnia
http://www.genealogienetz.de/reg/ESE/dsbosnia.html
http://www.genealogienetz.de/reg/ESE/dsbosnien.html
The Danube Swabians in Bosnia 1869-1942
http://www.danube-swabians.org/hrastovac/historical/Bosnia%27s_Donauschwaben.htm
Germans of Yugoslavia
http://en.wikipedia.org/wiki/Jugoslawiendeutsche#Bosnia_and_Herzegovina

Zweite Siedlungswelle im 19. Jahrhundert -> Bereits in osmanischer Zeit ließen sich Kolonialisten im Umfeld eines deutschen Trappistenklosters unweit Banja Luka nieder, verstärkt ab 1878, nach der Okkupation durch Österreich-Ungarn. -> Already in the Ottoman period, colonists settled in the vicinity of a German Trappist monastery near Banja Luka, strengthened in 1878 after the occupation by Austria-Hungary.
http://www.kulturforum.info/de/topic/1014510.bosnien-herzegowina.html

old germanized placenames in Bosnia by german settlers and also at time of Austrian-Hungarian Empire:
http://exonyme.bplaced.net/Board/Thread-Bosnien-und-Herzegowina