Sophia Betje Mossel was a daughter of Meijer Jozua Mossel and Lea Joseph Fedder and was born on 25 October 1862 in Amsterdam. She married there the grocer Abraham Juda Boas, a son of Juda Abraham Boas and Grietje Cohen. He was born in Amsterdam too, on 13 April 1863. On 23 September 1886 their daughter Margaretha was born and on 22 November 1887, Lea was born, who however already died within two m…