If it's Jane-uh you want then I think the spelling
Jayna best promotes that.
I'm afraid Janea would be pronounced Jane-ee-uh,
Jana is JAN-uhm and
Janae is obviously Jen-AY.
I have seen it spelled Jaena, but I don't think it looks any better, plus the "y" is less confusing to many, or that would be my guess.
Your eyes, your smile, made my little life worthwhile. The sky was a lot more blue when I was on top of you.
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Fudge, Packer?
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Cannibal! The Musical
http://www.cannibalthemusical.net/