Question: What was the nickname of the family that owned Ashley Park around the turn of the 20th century?

Context paragraphs:
Ashley Park: Ashley Park is a private residential neighbourhood at Walton-on-Thames in Surrey.  Its central feature was a grandiose English country house, at times enjoying associated medieval manorial rights, which stood on the site, with alterations, between 1605 and the early 1920s.  Its owners included Charles Sackville, 2nd Duke of Dorset in the 18th century and members of Sassoon family around the turn of the 20th century.

Green Spring Valley Historic District: Green Spring Valley Historic District is a national historic district near Stevenson in Baltimore County, Maryland, United States.  It is a suburban area of Baltimore that acquires significance from the collection of 18th, 19th, and early 20th century buildings.  The park-like setting retains a late 19th-early 20th century atmosphere.  At the turn of the 20th century, the Maryland Hunt Cup and the Grand National fox hunt were run over various parts of the valley.

20th Century Fox Television: Twentieth Century Fox Television (TCFTV, stylized as 20th Century Fox Television) is the television production subsidiary of 20th Century Fox, and a production arm of the Fox Television Group (both are owned by Rupert Murdoch's 21st Century Fox).  20th Television is the syndication and distribution arm of 20th Century Fox Television.

Eldridge Park: Eldridge Park, located in Elmira, New York, was a famous amusement park around the turn of the 20th century.  Covering roughly 15 acre , it was dedicated to the memory of a local physician and was in common usage late into the 20th century.

Stallmästaregården: Stallmästaregården (or Stallmästargården) is a historic inn adjacent to the park around the Royal Pavilion at Haga in Solna, just north of the Stockholm city limits.  It has existed since the 17th century, and is mentioned numerous times in the works of August Strindberg.

Harry Smith House (Riverdale Park, Maryland): The Harry Smith House is a Queen Anne-style frame dwelling, built in 1890.  It stands on one of the original streets platted in the 1889 railroad suburb subdivision of Riverdale Park, Prince George's County, Maryland located northeast of Washington, D.C..  The home is representative of the transition in domestic architecture between the Queen Anne style of the 1880s and the popular plan of the turn of the 20th century.  Its owners were a middle class, government worker family, the Smiths, who owned it from the time when the developer sold it until the middle of the 20th century.

Ashley, New Forest: Ashley is a village located in the southwest of Hampshire, England.  It lies on the eastern outskirts of New Milton in the New Forest district, and is two miles (3 km) inland from the sea.  Its history dates back to the Domesday book of 1086, when two estates were recorded.  In the 15th century much of Ashley merged with a neighbouring manor, and the estate became known as Ashley Arnewood.  As a village, Ashley began to develop in the 19th century when a church and a school were built.  Most of the current village was built in the 20th century, and today Ashley is effectively a suburb of New Milton.

Sassoon family: The Sassoon family, known as "Rothschilds of the East" due to the great wealth they accumulated in trade, is of Baghdadi Jewish descent and international renown.  It was based in Baghdad, Iraq, before moving to Bombay, India and then spreading to China, England, and other countries.  It is said that the family descended from the Shoshans, one of the families of Iberian Peninsula.  From the 18th century, the Sassoons were one of the wealthiest families in the world, with a merchant empire spanning the continent of Asia.

Mount Nebo (Poolesville, Maryland): Mt. Nebo is a historic home located at Poolesville, Montgomery County, Maryland, United States.  It is a large 2 ⁄ -story gable-roofed frame dwelling constructed in three periods: the main block, dating to the second quarter of the 19th century; a 1 ⁄ -story wing extends from the rear of the main block, which appears to have been an earlier dwelling from the late 18th century; and a two-story addition was made to the east gable end of the main block around the turn of the 20th century.  Also on the property is a mid-19th-century log smokehouse and the remains of an early terraced "waterfall" garden.  The property derives additional significance from its association with the White family through the latter half of the 19th century.  Joseph White (1825–1903) was a locally prominent supporter of the Confederate cause during the American Civil War.

20th Century Fox Records: 20th Century Fox Records, also known as 20th Fox Records and 20th Century Records, was a wholly owned subsidiary of film studio 20th Century Fox.  The history of the label actually covers three distinct 20th Century Fox-related operations in the analog era, ranging chronologically from about 1938 to 1981.

Supporting paragraphs: Ashley Park Sassoon family
Answer: Rothschilds of the East