Duke Peter of Oldenburg died on Thusrday 18.11.2016 at the age of 90.. He was born on 07.08.1926 as second son of Hereditary Grand Duke Nikolaus of Oldenburg and his first Helene, née Princess zu Waldeck and Pyrmont. In 1951 he married Pricness Gertrud zu Löwenstein-Wertheim_Freudenberg in a double Wedding as his older brother, Duke Anton Günther married Princess Gertrud's older sister Princess Amelie. he and his wife had four children together. Duchess Gertrud died in 2011.