On 15 April 1931, shortly before his death, Albert wrote to her, admitting to her his paternity. After this, on 12 May she changed her surname from Schwalb, the name of her foster family, to "zu Schleswig-Holstein".
In April 1931, just before his passing, Albert wrote a letter to her revealing his paternity. Following this, in May, she adopted the surname "zu Schleswig-Holstein" as a replacement for her foster family's name, Schwalb.