 In 1917, 188 municipalities were renamed; all counties were given new names in 1918; and several of the largest cities were renamed in the 1920s; notably Kristiania became "Oslo", Fredrikshald became "Halden", for example.Some of these changes were less popular.For example, some residents of Sandviken were none too pleased about the "radical" change to "Sandvika", nor were many in nearby Fornebo willing to accept "Fornebu".