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.