Mellonm Constance Prosser (Burrell) was born and raised in Englewood, New Jersey, into a prominent banking family whose influence reached across the financial world of the early twentieth century. She was the daughter of Seward Prosser, a leading banker who served as chairman of the Bankers Trust Company of New York, and Constance Mary Barber. Raised in an environment shaped by finance and public leadership, she later attended Bennett College in Millbrook, New York, a well-known institution for women’s education during that era.

Her personal life linked her to one of the nation’s most powerful industrial and financial dynasties. In 1929, she married Vance McCaulley, who died in 1935. The following year, in 1936, she married Richard King Mellon, a financier and industrial leader whose family controlled vast holdings in banking, energy, manufacturing, and philanthropy. Their marriage lasted until Mellon’s death in 1970.

During her years as part of the Mellon family, she lived primarily at Huntland Downs, the Mellon estate in Ligonier, Pennsylvania. The estate became well known for hosting annual steeplechase races and social gatherings that attracted participants from across the region. In addition to this residence, she maintained homes in Cape Cod, Georgia, and Nassau, reflecting the wide geographic reach of her family’s business and social life.

In 1971, she married Peter E. Burrell, an Englishman who had spent more than thirty years as director of the National Stud of the United Kingdom, an organization devoted to improving the breeding and quality of horses. This marriage reflected her continued involvement in equestrian traditions associated with the Mellon estate and its racing culture.

Constance Prosser Burrell was the mother of four children: Richard Prosser Mellon, Cassandra M. Milbury, Seward Prosser Mellon, and Constance Mellon. Through her children and extended family, she remained connected to the management of significant financial and philanthropic institutions. Her son Seward Prosser Mellon later held leadership roles in organizations overseeing family investments and charitable foundations tied to industries such as banking, energy, and manufacturing.

She died on November 12, 1980, at the age of 70. A memorial service was held at Saint Michael’s of the Valley Episcopal Church in Ligonier, Pennsylvania. Though much of her adult life was spent outside New Jersey, her early years in Englewood connected her to a lineage of influential financial leadership that shaped both local and national institutions.