┌─Dietrich Count of Oldenburg ⇒
┌─Christian I King of Denmark
│ └─Helvig of Schauenburg ⇒
┌─Frederick I King of Denmark
│ │ ┌─John Margrave of Brandenburg-Kulmbach ⇒
│ └─Dorothea of Brandenburg
│ └─Barbara of Saxe-Wittenberg ⇒
┌─Christian III King of Denmark
│ └─Anna of Brandenburg
Frederik II King of Denmark
└─Dorothea Duchess of Saxe-Lauenburg