Daniel Day-Lewis the second child of poet Cecil Day-Lewis (1904–1972) and his second wife, actress Jill Balcon (1925–2009). His older sister, Tamasin Day-Lewis (born 1953), is a television chef and food critic. His father, who was born in the Irish town of Ballintubbert, County Laois, was of Protestant Anglo-Irish descent, lived in England from the age of two, and was appointed Poet Laureate of the United Kingdom. Daniel's mother was Jewish; her ancestors were immigrants to England in the late 19th century, from Latvia and Poland. Day-Lewis' maternal grandfather, Sir Michael Balcon, became the head of Ealing Studios, helping develop the new
Andrew L. Lewis Jr. from Harvard University. He did postgraduate work at MIT in 1968. In June 1950, he married the former Marilyn Stoughton, a Republican former member of the Pennsylvania House of Representatives. The Lewises had four children together and fourteen grandchildren; son Andrew L. Lewis, III, died in infancy. His son Andrew "Andy" Lewis, IV, served as a township commissioner in Haverford Township between 2004 and 2007 and was elected in 2007 to the Delaware County Council. Lewis's sister, Floy Lewis Bakes, graduated from Ursinus College; he donated $3 million to Ursinus to build a field house, which became the Floy Lewis