Ernst-Johann Karl Oskar Eitel-Friedrich Peter Burchard, Prince Biron von Courland (born 6 August 1940) is the senior male-line descendant of Ernst Johann von Biron, and as such heir to the Duchy of Courland and Semigallia. He was born in Berlin, the eldest son of Karl, Prince Biron of Courland (1907-1982), and Princess Herzeleide of Prussia (1918-1989), the daughter of Prince Oskar of Prussia (a son of Emperor William II) and Augusta Viktoria of Schleswig-Holstein. He is in line to the British throne through his descent from Queen Victoria's daughter, Victoria, Princess Royal. Private life Prince Ernst-Johann was married to Countess Elisabeth zu Ysenburg-Büdingen in Philippseich (born 1941) in Munich in a civil ceremony on 14 August 1967, and in a religious one the next day.<ref name="burke" /> The couple have two adopted daughters: *Anja Prinzessin Biron von Curland (born 25 January 1975). *Christiana Prinzessin Biron von Curland (born 23 May 1977). Ancestry