Avram Kalef and family

This is a picture of my granduncle Avram Kalef and his family. He was the eldest of my grandmother Matilda Kalef's siblings. Here you can also see (from left to right) his children Stella Darsi (nee Kalef), Josko Kalef, Regina Eskenazi (nee Kalef) and Avram's wife, Vukica. The photo was taken in Belgrade. Vukica was my granduncle Avram's second wife. From his first marriage he had a daughter, Stella, and with Vukica he had Regina and Josko. They lived at 4 Skenderbegova Street in Belgrade. Regina is one of my few relatives to survive World War II. She married a Bulgarian man named Isak Eskenazi and they lived out the war in Bulgaria. In 1948 she, her husband and her children, Marsel and Avram, left for Israel. I heard from them for a while but then we lost touch. I am sure that she and her husband have died by now, but it would be terribly interesting for me to find out where her children are.