There are a small number of bearers of the surname Caldicott found in Australia. They nearly all descend from a small number of pioneers –
Alfred Jolly Caldicott 1802-1888 who emigrated from Staffordshire, England to Australia in 1853, along with his wife and his five surviving children.
Thomas Weaver Caldicott 1854-1928 who emigrated from Herefordshire, England to Australia in 1870 at the age of just 16!
Alfred Millwater Caldicott 1827-1875, nephew of Alfred Jolly Caldicott, who emigrated from Birmingham, England to Australia to work for the Australian Immigration Office.