A brief genealogical sketch of her is here. Brockdorff was in Denmark, but is now in Germany. After several wars over Schleswig-Holstein, a referendum in 1920 fixed the German-Danish border in its present location- the north went Danish and the south went German.
From pinterest.com/2rita0459/woman-in-art-19c/; spots removed from background, particularly foliage and other small flaws removed from background with Photoshop. Also posted to the “Early” “Victorian” - 1837 to 1870 Album here.