 Philip Philip's father, Philip Livingston (1716–1778), supported the patriot cause prior to the revolution, and as a delegate to the Second Continental Congress signed the Declaration of Independence.He was married to Christina Ten Broeck (1718-1801), the sister of Abraham Ten Broeck (1734-1810) who was married to Elizabeth Van Rensselaer, sister of Stephen Van Rensselaer II, patroon of Rensselaerwyck.His maternal grandparents were Walter Livingston (1740–1797), the 1st Speaker of the New York State Assembly, and Cornelia Schuyler (1746–1822), the granddaughter of Pieter Schuyler.