Martha Asser was the daughter of Moritz Mouritz Asser and Henriette Levin. Martha came from Altona. A friend of Barend Swartberg from Assen was married to Martha's sister. At one point, Barend went to Altona and met Martha there. They were married in Altona-Hamburg on 23 June 1904. They had two children. After Barend died, Martha went to live with her son Louis and his wife Maria Sara Gosler. Mart…