The jewish Bauers, who changed their named to Rothschild, are so intermarried within rich european catholic nobility as to now be one and the same.
Prominent marriages into the family include, among many others:
Liliane de Rothschild (1916–2003, née Fould-Springer), art collector
David René de Rothschild married Princess Olimpia Anna Aldobrandini, of the House of Borghese and the House of Bonaparte.[111]
Baron Robert Philippe de Rothschild married Nelly Beer, a great-grand-niece of Giacomo Meyerbeer
Richard Francis Roger Yarde-Buller, 4th Baron Churston of Churston Ferrers and Lupton (1910–1991), married Olga Alice Muriel Rothschild
Serena Dunn Rothschild (1935-2019), granddaughter of Sir James Hamet Dunn, 1st Baronet
Lynn Forester de Rothschild (born 1954), businesswoman
Edward Maurice Stonor (1885–1930), son of Francis Stonor, 4th Baron Camoys[citation needed]
Lady Pamela Wellesley Grant (born 1912), great-great-granddaughter of the Duke of Wellington, married Lieutenant Charles Robert Archibald Grant, great-great-grandson of Mayer Amschel de Rothschild
Baroness Rozsika Edle von Wertheimstein[9]
Baron Etienne van Zuylen van Nyevelt of the House of Van Zuylen van Nyevelt – married Baroness Hélène de Rothschild (1863–1947).[121]
Baron Sigismund von Springer (1873–1927), married Baroness Valentine Noémi von Rothschild (1886–1969), after whom the asteroid 703 Noëmi is named
In 1943 Baron Elie Robert de Rothschild (1917–2007), married Lady Liliane Elisabeth Victoire Fould-Springer, great-aunt of actress Helena Bonham Carter[122]
In 2015, James Rothschild married American heiress and socialite Nicky Hilton, the great-granddaughter of Hilton Hotels founder Conrad Hilton[123][124]
https://en.wikipedia.org/wiki/Rothschild_family