On 11 September 1796 Nichols married Mary Warren, and after her death by drowning in October 1804, he married Roseanna Abrahams, daughter of Esther Johnston (née Abrahams), on 18 February 1805.
On 11 September 1796 Nichols married Mary Warren, who died by drowning in October 1804. At the age of 35, Nichols married 18-year old Roseanna Abrahams, daughter of Esther Johnston (née Abrahams), on 18 February 1805.