On December 12, 1833, Delafield was married to
Julia Livingston (1801–1882). His wife was a daughter of
Margret (née Lewis) Livingston and
Maturin Livingston, twice the
Recorder of New York City. Her uncle was Speaker
Peter R. Livingston and her paternal grandparents were Robert James Livingston and Susanna (née Smith) Livingston (sister of Chief Justice
William Smith and daughter of Judge
William Smith). Julia's mother was the only daughter and sole heiress of Gov.
Morgan Lewis and
Gertrude (née Livingston) Lewis. Together, they were the parents of four children: •
Lewis Livingston Delafield (1834–1883), who married Emily Prime (1840–1909), a granddaughter of banker
Nathaniel Prime. • Maturin Livingston Delafield (1836–1917), who married Mary Coleman Livingston (1847–1922), a daughter of Eugene Augustus Livingston. • Joseph Delafield Jr. (1839–1848), who died young.
Descendants Through his son Lewis, he was the grandfather of Lewis Livingston Delafield Jr. (1863–1944), Robert Hare Delafield (1864–1906), and Frederick Prime Delafield (1868–1924). Through his son Maturin, Joseph Livingston Delafield (1871–1922), John Ross Delafield (1874–1964) (husband of
Violetta White Delafield), Julia Livingston (née Delafield) Longfellow (1875–1963),
Edward Coleman Delafield (1877–1976), Mary Livingston (née Delafield) Finch (1878–1961), Harriet Coleman (née Delafield) Carter (1880–1953), and Eugene Livingston Delafield (1882–1930). ==References==