- 1 Laurence McDermott (1808- ) (Ireland to Jersey) m Mary Murphy (1815- )
- 2 George McDermott (1845- )
- 2 Laurence McDermott (1847-1911) (Louth) [1] m Margaret O'Keeffe (1864-1945)
- 3 Rose Mary McDermott (1884-1953) (St H)
- 3 Henry Laurence McDermott (1888-1944) (St H) m (1910) Emily Theresa Le Lievre (1891-1981) (Gsy), d of David (1841- ) and Theresa Gellender (1858- )
- 4 Francis Joseph McDermott (1912-1983)
- 4 Dorothy Maud McDermott (1913-1981)
- 4 Henry William McDermott (1914-1975) m Elsie May Jones (1906-1986)
- 5 Raymond Francis McDermott (1941-1991)
- 4 Elsie Margaret McDermott (1916-2005) m Kenneth Yvon O'Brien (1916-1995)
- 4 Phylis Maud McDermott (1918-1972)
- 4 Raymond Cecil McDermott (1920-1992) m Marjorie May Giffard (1920-2007)
- 4 George Arthur McDermott (1922- )
- 4 Bernard McDermott (1924-1993) m Monica Pearl Vibert 91927-2006)
- 5 Donna McDermott (1962-1996)
- 4 Joan Winifred McDermott (1926-2007) m Raymond Joseph Tostevin (1926-1991)
- 4 Madeline Theresa McDermott
- 4 Henry George Laurence McDermott
- 3 Francis Joseph McDermott (1890-1917) (St H)
- 3 Frederick William McDermott (1891- )
- 3 Florence Henrietta McDermott (1892-1972) (St H) m William Le Riche (1900- )
- 3 George Arthur McDermott (1893-1893) (St H)
- 3 Arthur George McDermott (1893-1894) (St H)
- 3 George Arthur McDermott (1895- (St H)
- 3 Maude Mary McDermott (1898-1982) (St H) [2] m (1927, St H) James Thomas Sexton (1900- ) [3], son of James [4]
- 3 Henry George Laurence McDermott (1911-1911) (St H)