Thank you for the nice comments about this place! Our host, Mike C., will be pleased, I'm sure -- as well as everybody here who try to get people's name questions answered. :)
Perhaps your name of "Mavine" is a form of "Mavis", an old name for the "song thrush" and perhaps first used as a person's name in a novel by Victorian "Violet Books" author Marie Corelli. The book in which the character Mavis Clair appears was published in 1895 and titled: *The Sorrows of Satan*. This was the second novel in Marie Corelli's occult trilogy.
Alternately, your name might be a variation of the Celtic names "Mave", "Meave", or "Mavis", which mean "mirthful joy".
-- Nanaea