You should contact the state archive of Republika Srpska in Banjaluka for information.
Their website:
http://www.arhivrs.org/DefaultLang.aspx?lang=eng&lang2=l...Among other holdings are the photos and archival materials about the visit of chess champion Aleksandar Alehin to Banjaluka in 1931. when one of the local chess enthusiasts he played against was Franjo Kuffner.
http://www.zoranmackic.com/wp-content/uploads/Aljehinova-sim...When searching local resources make sure you include alternate spellings - Terezija KUFNER is listed as one of the past members of RKUD"PELAGIĆ" folklor ensemble on their web page :
http://kudpelagic.blogspot.hu/2008/10/lanovi-od-osnivanja-k-...-att. : photo from this event, Banja Luka, 1931., part of photo collection of Arhiv Republike Srpske.
***
"Rodoslovlje" Serbian Genealogy Society
www.rodoslovlje.com