Question: In 2015, Nicky Hilton married into what family whose patriarch established his banking business in the city of Frankfurt in the 1760s?

Context paragraphs:
Brandon Jay: Brandon Jay (born September 11, 1984) is an entrepreneur.  Born in Columbia, South Carolina, he moved to Hollywood to co-found the IMA.  As a red carpet host, Brandon has interviewed the likes of Paris Hilton, Nicky Hilton, Fergie, Josh Duhamel.  At present Brandon is represented by Integrity Management Artists.

Stern family: The Stern family is a Jewish French banking family originally from Frankfurt.  It traces back to Samuel Hayum Stern (1760–1819), who in the 1780s became a wine merchant in Frankfurt.  His son, Jacob Samuel Heyum Stern, started a banking business, named , in 1805 in Frankfurt.  His sons expand the family venture to Berlin, London, and Paris, of which the latter became most prominent as .  and J. Stern & Co.

Islamic banking in Malaysia: The first Islamic bank in Malaysia was established in 1983.  In 1993, commercial banks, merchant banks and finance companies were allowed to offer Islamic banking products and services under the Islamic Banking Scheme (IBS).  These institutions however, are required to separate the funds and activities of Islamic banking transactions from that of the conventional banking business to ensure that there would not be any co-mingling of funds.

Rothschild family: The Rothschild family is a wealthy family descending from Mayer Amschel Rothschild, a court Jew to the German Landgraves of Hesse-Kassel in the Free City of Frankfurt, who established his banking business in the 1760s.  Unlike most previous court Jews, Rothschild managed to bequeath his wealth and established an international banking family through his five sons, who established themselves in London, Paris, Frankfurt, Vienna, and Naples.

Zarai Taraqiati Bank Limited: The Zarai Taraqiati Bank Limited (ZTBL) (formerly known as ADBP - Agricultural Development Bank of Pakistan) is the largest public sector Specialized financial development institution in Pakistan.  Zarai Taraqiati Bank Limited (ZTBL) was incorporated as a public limited company in 2002 under Companies Ordinance, 1984.  The bank provides agriculture credit and banking services to farmers across the country.  The bank continues to remain the largest public sector agriculture development financial institution in the country.  ZTBL has a limited banking license which restricts the institution from undertaking broad range of banking business.  The bank has applied for commercial banking license to the  State Bank of Pakistan  (SBP); however no decision has yet been taken with regards to the same.

It Girls: It Girls is a feature documentary film directed by Robin Melanie Leacock that aired on the Women's Entertainment channel on April 2 and 7 2002.  It features wealthy socialites including Casey Johnson, Elisabeth Kieselstein-Cord and Nicky Hilton, as well as appearances by Diane Von Furstenberg, Marisa Berenson and other women.  It was filmed in Manhattan during Fashion Week.  The film's premise is that anyone can be an it girl.  In the documentary von Furstenberg says "It's really about being a forever girl!"

Nicky Hilton Rothschild: Nicholai Olivia Rothschild (née Hilton; born October 5, 1983) is an American fashion designer, socialite, and model.  She is a member of the Hilton family by birth, and a member of the aristocratic Rothschild family through her marriage to James Rothschild (a grandson of Victor Rothschild, 3rd Baron Rothschild) in 2015.

Our Loved Ones: Our Loved Ones (French: Les êtres chers ) is a 2015 Canadian drama film, directed by Anne Émond and starring Maxim Gaudette and Karelle Tremblay.  The story centres on a family whose patriarch committed suicide in 1978, and explores the continuing emotional impact of his death on his now-adult son David (Gaudette) and David's daughter Laurence (Tremblay).

Banking license: A banking license is a legal prerequisite for a financial institution that wants to carry on a banking business.  Typically, a business is not permitted to call itself a bank unless it holds a banking license.  Under laws of most jurisdictions, general banking activities, such as taking deposits from the general public, are exclusive to holders of a banking license.  A non-banking financial company is an institution that provides financial services without meeting the legal definition of a bank, such as holding a banking license.

Kathy Hilton: Kathy Hilton (born Kathleen Elizabeth Avanzino, later Richards; March 13, 1959) is an American actress, fashion designer and philanthropist.  She is the mother of socialite Paris Hilton and fashion designer Nicky Hilton.

Supporting paragraphs: Nicky Hilton Rothschild Rothschild family
Answer: The Rothschild family