I also knew a Nina, pronounced NIE-nə, in high school. While I definitely knew what her name was, and never messed it up, reading it in print never made any dang sense to me. Unfortunately I can't say I'm a fan of it. (Then again, I'm not crazy about regular Nina, either.)
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www.behindthename.com/pnl/69381www.behindthename.com/pnl/69381/117507www.behindthename.com/pnl/69381/109399www.behindthename.com/pnl/69381/132018