On June 6, 1758, Livingston was married to his cousin, Margaret Livingston (1738–1809), in New York City. Margaret was a daughter of Maria ( Kierstede) Livingston and Jacobus "James" Livingston (a son of
Robert Livingston the Younger). Together, they were the parents of eleven children, including: • Robert Thong Livingston (1759–1813), who married Margaret Livingston, daughter of John Livingston and Catherine ( de Peyster) Livingston, in 1787. His brother's house,
Teviotdale, adjoined The Hermitage to the south. Although he was the eldest son and principal heir of his father, Peter ran up considerable debts during his father's lifetime, and as part of the action taken to curtail his inheritance, his father built him The Hermitage, although the house was put in the name of Peter's eldest son, Robert. Peter's father hoped his son would add a second story but he never did. The house was sold among Livingston family members for many years but wasn't completed until 1939 when "a wing and lifted the roof, adding another story and a half and a portico - a covered porch supported by columns" were added by
Ida Helen Ogilvie, founder and former head of
Barnard College's
Geology department, and her architect, Harold R. Sleeper. ==Sources==