Ernst Lang married Paula Prüller 1958 in Luby, Czech Republic, formerly named Schönbach, and both came from families involved in the production of musical instruments. Ernst Lang’s father, Rudolf, made violins and violas while Paula’s father, Andreas Prüller, owned a company producing purflings for violins, cellos, and guitars. After World War II, the Czech government started nationalizing production facilities and Paula and Ernst Lang’s parents were recruited to work at Cremona in Luby where they both eventually joined the company.