From the St Lawrence baptism register,
August 1839 William George Mauger, son of Edouard Mauger and Marie Elizabeth Wright.
Lots of siblings,
1820 Marie - this entry says daughter of Edouard Jnr
1829 George William
1831 Jean (John)
1834 Charles Samuel
Going by the re-use of Christian names some of these children died in infancy.