Gabriel and Lauren it is! And I love TheresaLily, it flows so beautifully. Is that her name? And how do you feel about nicknames? Just as a general, not necessarily for Theresa (although I do admit I like the nickname Tessa).
I don't like Terry either, but I do like Tess as much as I do Tessa. In general I'm a nicknamer, but I'm also completely fine without one as well. I think TheresaLily Chapman is a great name on its own.