I want to go for a name that suggests a combination of a Southern US and Latin American cultural background with a Goth twist.
What about
Magnolia Lilith Betancourt?
Lilith as in the one who refused to submit to
Adam and was kicked out of the Garden of
Eden as a result.
Or
Magnolia Branwen Betancourt? I know, two initial B sounds in a row, but
Branwen means "white raven" in Old Welch.