Possibly contracted from an earlier river name *Luvijoki (compare the name Luvijärvi for a nearby lake). The root *luvi- is of unknown origin and meaning.[1]
The external locative cases (adessive, allative and ablative) are used with this place name when referring to a location; for example, "in Luvia" is Luvialla.
^ Sirkka Paikkala, editor (2007), Suomalainen paikannimikirja [Book of Finnish Place names] (in Finnish), Helsinki: Karttakeskus, Kotimaisten kielten tutkimuskeskus, →ISBN