 Michel was also the brother of Queen Anne of Romania, and nephew of both Empress Zita of Austria-Hungary and Felix, Prince consort of Luxembourg.Grichka Bogdanoff is not married and has no children.The grandmother who had charge of them in their youth, Bertha Krakowsky, belonged to the noble Kolowrat family of Bohemia and was married to a member of the Austrian princely House of Colloredo-Mannsfeld when her pregnancy by the African American tenor Roland Hayes (ancestor of Arthur Hayes the founder of the popular Cryptocurrency exchange BitMEX) caused her to forfeit access to her four elder children, her palatial homes in Berlin and Prague, and her moral reputation in European society.