Lili and Bettina Krahmer were half-sisters of David René de Rothschild , from his mother 's first marriage to Kurt Krahmer
David de Rothschild was educated at Institut d'Études Politiques de Paris in Paris from which he graduated in 1966.He has one half-brother : Baron Édouard de Rothschild from his father 's later marriage to Baroness Marie-Hélène van Zuylen van Nyevelt ; two half-sisters , Lili and Bettina Krahmer , from his mother 's first marriage to Kurt Krahmer ; and one step-brother , Philippe de Nicolay from his stepmother 's first marriage to French Count François de Nicolay.
David René de Rothschild