Benjamin Jacob Krönstein lived with his mother, Sara, and his grandmother, Judik, under the lighthouse Brandaris on Terschelling. In 1921 his mother had married Abraham Krönstein, a Russian merchant, in London. But before the birth of their son, Benjamin Jacob, she returned to Terschelling. The marriage was dissolved in 1935. So the name Krönstein was unknown on Terschelling; everyone knew Benjami…