Bertram, Balthasar Christian Friedrich 1725-30.mar.1787 Germany, Salzwedel - Berlin
violinist, studied violin with Johann Gottlieb Graun, 1754 and 1774-1786 violinist at the court of the king of Prussia in Berlin and at the
'Opern-Kapelle' in Berlin, 30.mar.1787 buried at the Dreifaltigkeitskirche in Berlin