She was the only daughter of Prince Oskar of Prussia (the second youngest son of Emperor Wilhelm II) and his initially morganatic wife, Countess Ina Marie von Bassewitz.
Countess Herzeleide-Ina-Marie von Ruppin was born in Bristow, Mecklenburg, on 25 December 1918,[1] shortly after the defeat of the German Empire and the collapse of the monarchy.
Herzeleide and her brothers became Princess/Prince of Prussia on 21 June 1920 when their parents' morganatic marriage was recognised as dynastic by the deposed Emperor Wilhelm II.
He was a direct descendant of Ernst Johann von Biron who obtained sovereignty of the Baltic Duchy of Courland and Semigallia in the 18th century.
[4] The couple's honeymoon plans included a visit to Doorn to pay respects to Emperor Wilhelm in exile,[2][4] the bride's paternal grandfather.