roihu + vuori. Based on a mistaken Swedish name *Kasberget, interpreted as kase(“guard fire, pyre”) + berg(“mountain”). The actual name is probably *Kasaberget,[1] but its ultimate etymology is uncertain.
^ Sirkka Paikkala, editor (2007), Suomalainen paikannimikirja [Book of Finnish Place names] (in Finnish), Helsinki: Karttakeskus, Kotimaisten kielten tutkimuskeskus, →ISBN