The name was often written "Christianssand" until 1877, although the map of the mapmaker Pontoppidan from 1785 spelled the name "Christiansand" (with a single 's'). That year, an official spelling reform aimed at making city names "more Norwegian" changed it to "Kristianssand". Kristiansund and Kristiania, now Oslo, had their spellings changed under the same reform. Despite that, a number of businesses and associations retain the "Ch" spelling. The name was again changed to its present form, "Kristiansand" (single "s"), in 1889.