Christian is a great-grandson of the last Grand Duke of Oldenburg, Frederick Augustus II and through his mother he is related to the Princes of Löwenstein-Wertheim-Freudenberg, who belong to a morganatic branch of the House of Wittelsbach descending from Frederick I, Elector Palatine.
Frederick Augustus II (16 November 1852, Oldenburg – 24 February 1931, Rastede) was the last ruling Grand Duke of Oldenburg.
Augustus | Frederick the Great | Frederick | Frederick II | Frederick II, Holy Roman Emperor | Frederick Russell Burnham | Frederick Roberts, 1st Earl Roberts | Frederick Law Olmsted | Frederick I, Holy Roman Emperor | Frederick Forsyth | Frederick Douglass | Frederick, Maryland | Prince Frederick, Duke of York and Albany | Frederick III | Frederick I | Frederick Delius | Frederick William III of Prussia | Augustus John | John Frederick II, Duke of Saxony | Frederick III, German Emperor | Frederick William IV of Prussia | Frederick Schomberg, 1st Duke of Schomberg | Frederick I, Margrave of Brandenburg-Ansbach | Frederick III, Holy Roman Emperor | Augustus Saint-Gaudens | Frederick, Prince of Wales | Frederick Funston | Frederick Ashton | Augustus Pugin | John Frederick II |
Duke Anton-Günther is a grandson of the last Grand Duke of Oldenburg, Frederick Augustus II.