Erlaucht
Schönborn was born at Skalka Castle, west of Litoměřice in Bohemia (then Czechoslovakia, now part of the Czech Republic), the second son of Maria Hugo Damian Adalbert Josef Hubertus, Graf von Schönborn, and Baroness Eleonore Ottilie Hilda Maria von Doblhoff. He is a member of the princely House of Schönborn whose members bore before 1918 the title of Count and the style of "Illustrious Highness". Several members of the Schönborn family held high offices in the Catholic Church and, since the 17th century, the Holy Roman Empire, including several prince-bishops, cardinals and ecclesiastical prince-electors. One ancestor was Franziskus von Paula Graf von Schönborn, cardinal-archbishop of Prague. When aristocratic titles were abolished in the First Czechoslovak Republic, after its independence in 1918, just as in Austria, his father officially lost his title of count, although titles continue to be used privately.