The name is possibly derived from the Finnish word oiva meaning “excellent.” Its designated name-day is September 25. To hear how the name is pronounced, go here: http://www.forvo.com/search/Oivi/
The name comes directly from the Finnish word for excellent. Its designated name day is September 5th. Pronuniciation can be heard here: http://www.forvo.com/search/Mainio/
Feminine forms are, Maina, Maini and Mainikki the designated name-day is May 3rd.