Two sources: one is a 1973 article on the Beland family from the newsletter "Der Wandsbeker" which states that J.F.L. Beland married an English woman "Ann geb. Broten"; and the second is the set of portraits of the couple that I mentioned earlier. Under the wife's image is written "Anna Beland geb. Broten". On the back, someone (possibly my grandmother, who owns the pictures) wrote "Susanna Anna Beland nee Brodten".