The name is derived from the Lithuanian word vaivorykštė meaning “rainbow.”
In Lithuanian mythology, the name is borne by a minor goddess of the rainbow.
According to one account, the lightning god, Perkunas, was suppose to marry the goddess Vaiva on a Thursday, but she was kidnapped by the evil Velnias and Perkunas has hunted down Velnias ever since.
Another form of the name is Vaivora.
The designated name-day is June 18.