George Washington Parke Custis was born on April 30, 1781, at Mount Airy in Maryland, the youngest child of John Parke Custis and Eleanor Calvert Custis. His father was Martha Washington’s son by her first marriage, making George Washington his step-grandfather. His mother descended from Maryland’s Calvert family. Custis was only months old when his father died of camp fever following the Yorktown campaign. George and Martha Washington took the infant and his sister Eleanor, known as Nelly, into their household. Custis therefore grew up at Mount Vernon and later in the presidential residences at New York and Philadelphia. Washington treated him affectionately but worried about his lack of discipline. Tutors instructed Custis in classics, writing, mathematics, history, and gentlemanly accomplishments, but he proved an inconsistent student. He attended several institutions, including the College of New Jersey at Princeton and St. John’s College in Annapolis, without completing a degree. His wealth and inheritance reduced the economic consequences of academic failure. As the only male Custis heir of his generation, he inherited extensive lands and enslaved people, along with a powerful sense of responsibility for preserving Washington family memory. Custis’s childhood gave him unparalleled access to the first president’s private life. He observed visitors, ceremonies, plantation management, and political conversations and later turned these memories into speeches, writings, and relic collecting. His upbringing also normalized the slaveholding system that sustained both Custis property and Mount Vernon. In 1804 he married Mary Lee Fitzhugh and began establishing Arlington House on inherited land overlooking the capital.