Gerson relatives?

My wife ANNE Winter (née) GERSON is looking for descendents/relatives of CHAIM GERSON born in Hohensalza, in the province of Pozen, Germany some time in the 19th century. His wife's given name was WINA, but her maiden name is unknown. They had five children, Richard, Hugo, Alfonse, Ulla and Franzie. Her grandfather was Hugo, who practised as a dentist in Stettin and in the army during WW1. Her father was Rudi (22.1.1915 - 4.12.45).