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Rockefeller Heiress Abby O’Neill’s 9,777-square-foot Long Island mansion on sale for $8.1 million

The Long Island mansion of Rockefeller heiress Abby O’Neill has landed on the market for $8.1 million four years after her death.  

Built in 1937, the Georgian brick manor house, located in Oyster Bay Cove, features 11 bedrooms and 7.5 bathrooms and sits on 31.37 acres.

O’Neill and her husband, George, purchased the home – also known as ‘Meriwether’ – in 1950 and lived in the home for nearly 70 years. 

The heiress died at the age of 89 in 2017, while George passed away at age 92 in 2019. 

O’Neill was the daughter of David Merriwether Milton and Abby Rockefeller Mauze. She was the eldest grandchild of American business magnate John D. Rockefeller, Jr. and Abby Aldrich Rockefeller.

She and her husband were well-known philanthropists and have six children, including George D. O’Neill – named after his father, Abby O’Caulkins, David M. O’Neill, Catharine O. Broderick, Wendy H. O’Neill and Peter M. O’Neill. They also have 18 grandchildren.  

O’Neill’s hosted their large family at ‘Meriwether’- which included their six children, 18 grandchildren and three great-grandchildren

Aerial view of the Oyster Bay Cove home where Abby Rockefeller O'Neill lived with her husband, George, for almost 70 years

Aerial view of the Oyster Bay Cove home where Abby Rockefeller O’Neill lived with her husband, George, for almost 70 years

The Long Island, New York estate also features amenities like a wine cellar, a heated pool and an elevator

The Long Island, New York estate also features amenities like a wine cellar, a heated pool and an elevator

The interior of the home features high ceilings rimmed by intricate crown molding, hardwood floors, French doors with transom lights, several bluestone patios, a bridal staircase, over-sized windows and a grand total of six fireplaces.

The interior of the home features high ceilings rimmed by intricate crown molding, hardwood floors, French doors with transom lights, several bluestone patios, a bridal staircase, over-sized windows and a grand total of six fireplaces.

Abby O'Neill died at the age of 89 in 2017

Abby O'Neill dedicated her life to business and philanthropy (she is pictured with David Rockefeller Jr in 1994)

O’Neill was the eldest grandchild of American business magnate John D. Rockefeller, Jr. and Abby Aldrich Rockefeller. She is pictured, right, with David Rockefeller Jr in 1994

According to the listing, the 9,777-square-foot home was designed by Kimball Husted.

Visitors of the Long Island estate are welcomed by a beautiful, spacious circular courtyard. 

To the left of the courtyard are three garages, totaling nine bays, and a two-bedroom guest cottage.

To the right of the courtyard you’ll find an in ground Gunite pool with bluestone patio, babbling rock waterfall, and pool house.

Once inside, the interior of the home features high ceilings rimmed by intricate crown molding, hardwood floors, French doors with transom lights, several bluestone patios, a bridal staircase, over-sized windows and a grand total of six fireplaces.

Abigail O'Neill was the daughter of David Merriwether Milton and Abby Rockefeller Mauze. She was the eldest grandchild of American business magnate John D. Rockefeller, Jr. and Abby Aldrich Rockefeller

Abigail O’Neill was the daughter of David Merriwether Milton and Abby Rockefeller Mauze. She was the eldest grandchild of American business magnate John D. Rockefeller, Jr. and Abby Aldrich Rockefeller

The second floor of the Long Island estate features a 'palatial and romantic' master suite with dual bathrooms and walk-in closets

The second floor of the Long Island estate features a ‘palatial and romantic’ master suite with dual bathrooms and walk-in closets

O'Neill was known to host her large family in her 31-acre, 11-bedroom estate in Oyster Bay Cove, New York

O’Neill was known to host her large family in her 31-acre, 11-bedroom estate in Oyster Bay Cove, New York

Perhaps the worlds most well-known businessman, O'Neill's great grandfather, John D. Rockefeller, was an oil tycoon and philanthropist

Perhaps the worlds most well-known businessman, O’Neill’s great grandfather, John D. Rockefeller, was an oil tycoon and philanthropist

The Long Island mansion of Rockefeller Heiress Abby O'Neill is on the market with an asking price of $8.1 million

The Long Island mansion of Rockefeller Heiress Abby O’Neill is on the market with an asking price of $8.1 million

To the left of the courtyard are three garages, totaling nine bays, and a two-bedroom guest cottage

To the left of the courtyard are three garages, totaling nine bays, and a two-bedroom guest cottage

O'Neill's great-grandfather's business tactics were often described as ruthless, buying smaller companies to grow his own until his oil company controlled 90% of the market

O’Neill’s great-grandfather’s business tactics were often described as ruthless, buying smaller companies to grow his own until his oil company controlled 90% of the market

The 9,777 square-foot single family home includes 11 bedrooms, seven full bathrooms and one partial bathroom

The 9,777 square-foot single family home includes 11 bedrooms, seven full bathrooms and one partial bathroom

Built in 1937, the Long Island Estate has 11 bedrooms and 7 full bathrooms with amenities such as a patio and a heated pool

Built in 1937, the Long Island Estate has 11 bedrooms and 7 full bathrooms with amenities such as a patio and a heated pool

The home also features amenities like a wine cellar, a heated pool and an elevator.

The estate has been well kept over the years, and recent remodeling includes the driveway, the pool, and central-air conditioning.  

Highlights of the home include a reception hall, a ballroom sized living room, banquet-sized dining room, and study used by O’Neill’s to host their large family – which included their six children, 18 grandchildren and three great-grandchildren. 

The second floor features a ‘palatial and romantic’ master suite with dual bathrooms and walk-in closets. 

O’Neill was part of one of America’s wealthiest and most influential families that owns one of the worlds largest fortunes. The Rockefeller family dynasty has spanned over 140 years.

O'Neill's estate, on the market for $8.1 million, features a kitchen with a breakfast room and a large butler's pantry

O’Neill’s estate, on the market for $8.1 million, features a kitchen with a breakfast room and a large butler’s pantry

O'Neill was part of one of America's wealthiest and most influential families that owns one of the worlds largest fortunes

O’Neill was part of one of America’s wealthiest and most influential families that owns one of the worlds largest fortunes

Highlights of the home include a reception hall, a ballroom sized living room, banquet-sized dining room, and study

Highlights of the home include a reception hall, a ballroom sized living room, banquet-sized dining room, and study

O'Neill served as Chairman of Rockefeller Financial Services and Rockefeller & Company from 1998 to 2004 and Trustee from 1979 to 1998

O’Neill served as Chairman of Rockefeller Financial Services and Rockefeller & Company from 1998 to 2004 and Trustee from 1979 to 1998

At its peak, John D. Rockefeller’s net worth, adjusted for inflation, was an estimated $418 billion

At its peak, John D. Rockefeller’s net worth, adjusted for inflation, was an estimated $418 billion

Visitors of the Long Island estate, also known as 'Meriwether' are welcomed by a beautiful, spacious circular courtyard

Visitors of the Long Island estate, also known as ‘Meriwether’ are welcomed by a beautiful, spacious circular courtyard

O’Neill and her husband were well known for their philanthropy, following in the footsteps of her famous grandfather and great-grandfather. 

Perhaps the worlds most well-known businessman, John D. Rockefeller, was an oil tycoon and philanthropist.   

Founder of the Standard Oil Company, O’Neill’s great-grandfather’s business tactics were often described as ruthless, buying smaller companies to grow his own until his oil company controlled 90% of the market. 

Standard Oil Company was eventually forced to break into multiple oil companies after it was declared a monopoly. 

At its peak, Rockefeller’s net worth, adjusted for inflation, was an estimated $418 billion. 

The home, listed for $8.1 million four years after Abigail O'Neill's death, is in Oyster Bay Cove on Long Island

The home, listed for $8.1 million four years after Abigail O’Neill’s death, is in Oyster Bay Cove on Long Island

To the right of the courtyard you'll find an in ground Gunite pool with bluestone patio, babbling rock waterfall, and pool house

To the right of the courtyard you’ll find an in ground Gunite pool with bluestone patio, babbling rock waterfall, and pool house

The estate is located in the Oyster Bay Cove- a village located in the town of Oyster Bay in Nassau County, New York

 The estate is located in the Oyster Bay Cove- a village located in the town of Oyster Bay in Nassau County, New York 

To the right of the courtyard you'll find an in ground Gunite pool with bluestone patio, babbling rock waterfall, and pool house

To the right of the courtyard you’ll find an in ground Gunite pool with bluestone patio, babbling rock waterfall, and pool house

Built in 1937, the Georgian brick manor house, located in Oyster Bay Cove, features 11 bedrooms and 7.5 bathrooms and sits on 31.37 acres

Built in 1937, the Georgian brick manor house, located in Oyster Bay Cove, features 11 bedrooms and 7.5 bathrooms and sits on 31.37 acres

The 9,777-square-foot home was designed by Kimball Husted in 1937, O'Neill lived in the home with her husband for 70 years

 The 9,777-square-foot home was designed by Kimball Husted in 1937, O’Neill lived in the home with her husband for 70 years

Visitors of the Oyster Bay Cove home are welcomed by a beautiful, spacious circular courtyard

Visitors of the Oyster Bay Cove home are welcomed by a beautiful, spacious circular courtyard

O'Neill's great grandfather, John D. Rockefeller, is remembered as one of the world's greatest philanthropists

O’Neill’s great grandfather, John D. Rockefeller, is remembered as one of the world’s greatest philanthropists

By the end of his life John D. Rockefeller had donated more than $500 million to various charitable causes-including medical research, public health and education

By the end of his life John D. Rockefeller had donated more than $500 million to various charitable causes-including medical research, public health and education

O'Neill and her husband lived in the Oyster Bay Cove home together for nearly 70 years prior to their deaths

O’Neill and her husband lived in the Oyster Bay Cove home together for nearly 70 years prior to their deaths

As the granddaughter of John D. Rockefeller Jr., O'Neill was part of one of America's wealthiest and most influential families

As the granddaughter of John D. Rockefeller Jr., O’Neill was part of one of America’s wealthiest and most influential families

The estate has been up-kept over the years - recent remodeling includes the driveway, the pool, and central-air conditioning

The estate has been up-kept over the years – recent remodeling includes the driveway, the pool, and central-air conditioning

O'Neill served as chairman of the Rockefeller Brothers Fund, a philanthropic foundation created and run by members of the Rockefeller family

O’Neill served as chairman of the Rockefeller Brothers Fund, a philanthropic foundation created and run by members of the Rockefeller family

The Rockefeller heiress died at the age of 89 in 2017. Her husband George died at age 92 in 2019

The Rockefeller heiress died at the age of 89 in 2017. Her husband George died at age 92 in 2019

But despite being known as a brutal businessman, Rockefeller is also remembered as one of the world’s greatest philanthropists. 

By the end of his life he had donated more than $500 million to various charitable causes-including medical research, public health and education.   

O’Neill’s grandfather, John D. Rockefeller Jr. was Rockefeller’s only son. He was also a world renown financier  philanthropist, known for the development of Rockefeller Center in midtown Manhattan. 

O’Neill and her husband were big supporters of the arts and continued her family’s legacy of business and philanthropy.  

O’Neill served as Chairman of Rockefeller Financial Services and Rockefeller & Company from 1998 to 2004 and Trustee from 1979 to 1998. She also served as chairman of the Rockefeller Brothers Fund, a philanthropic foundation created and run by members of the Rockefeller family.  


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