Here you can take a look at the family tree of the Dukes of Schleswig-Holstein-Sonderburg-Beck, later Sonderburg-Glücksburg. It starts in 1612 with August Philipp, a son of H. Alexander von Holstein-Sonderburg.
Since the time of Johann the Younger, the members of the house Schleswig-Holstein-Sonderburg-Glücksburg have carried a Coat of Arms which shows the origin of the family; two red chevrons against a golden background representing Oldenburg, while a golden cross with a blue background is taken from Delmenhorst.
The coat of arms bears a crowned golden lion on a red background holding a silver halberd with a golden haft, representing Norway, on the left with two blue lions above each other on a gold background, representing Schleswig, next to it. Below is a silver nettle leaf on a red background from Holstein, a silver horse with an armour-clad horseman from Dithmarschen to the right of it and a silver swan with a golden crown from Stormarn below.