- 1 Jan Courcoux (1716-1772) (Plaintel, Brittany) m (1751) Louise Lorant (1718-1766), d of Etienne and Marie Gautier
- 2 Guillaume Courcoux (1752- ) (Plaintel) m Gillette Le Cocq
- 3 Guillaume Jean Courcoux (1775-1842) (Plaintel)
- 3 Mathurin Courcoux (1784-1860) (Plaintel) m (1805, Plaintel) Noelle Morin (1783-1849) d of Guillaume (1722-1784) and Francoise Hellio (1747- )
- 4 Francoise Jeanne Courcoux (1806-1881) (Plaintel)
- 4 Jeanne Marguerite Courcoux (1811- ) (Plaintel)
- 4 Mathurin Pierre Courcoux (1815-1890) (Plaintel)
- 4 Francois Jacques Courcoux (1821-1883) (Plaintel) m (1850, Plaintel) Marguerite Courcoux (1828- ), d of Olivier Charles (1790-1857) and Louise Aubin (1799-1872)
- 5 Guillaume Francois Courcoux (1854-1920) (Plaintel) to Jersey m Marie Anne Roussel (1856-1926), d of Anne Marie Francoise Roussel (1841- ) (St Carreuc)
- 6 Guillaume Courcoux (1885-1914) (St H, Jer) d Battle of Coronel, South America
- 6 Eunice Marie Louise Courcoux (1898-1969) (St H) m Louis Philippe Raymond Audrain
- 5 Guillaume Francois Courcoux (1854-1920) (Plaintel) to Jersey m Marie Anne Roussel (1856-1926), d of Anne Marie Francoise Roussel (1841- ) (St Carreuc)
- 2 Ollivier Michel Courcoux (1757-1832) (Plaintel)
- 2 Guillaume Courcoux (1752- ) (Plaintel) m Gillette Le Cocq