Rashel Sidi's husband

This is my grandmother's sister Rashel Sidi's husband. The photo was taken in the Royal photo studio on Boyadjiev Street in Yambol in 1941. His first name was Buko, but I don?t know his surname. He worked in a special warehouse in Yambol where they worked with leather. My grandmother's sister used to come to Plovdiv very often. My great-grandmother Estrea lived with her in Yambol.