Sochan's maternal grandfather Juliusz Sochan, after whom he received his middle name, was a director of the basketball section of AZS AWF Warsaw and the president of the Warsaw Regional Basketball Association, his great-grandfather Zygmunt Sochan was an association football player for Warszawianka, making 94 appearances in the Ekstraklasa (Polish top division) before World War II, when he joined the Polish resistance against the German occupiers and was a Stutthof concentration camp survivor.