Marriage and children Darwin in 1842 with his eldest son, William Erasmus Darwin.On 29 January 1839, Darwin married his cousin Emma Wedgwood at Maer in an Anglican ceremony arranged to also suit the Unitarians. After first living in Gower Street, London, the couple moved on 17 September 1842 to Down House in Downe. The Darwins had ten children, three of whom died early. Many of his surviving children and their grandchildren would later achieve notability themselves (see Darwin — Wedgwood family)
Several of their children suffered illness or weaknesses, and Charles Darwin's fear that this might be due to the closeness of his and Emma's lineage was expressed in his writings on the ill effects of inbreeding and advantages of crossing.