The picture of a ballet choreographer like
Twyla Tharp makes me like the name. I'd go with this spelling since it's the one most people would have seen.
Twyla Marguerite is very nice.
Twyla FrancesTwyla MeadowTwyla Rosalind /
RosalieTwyla SophieTwyla Celeste (celestial twilight)
Twyla Aurore (twilight + dawn)
Twyla Estelle (starry twilight)
Twyla FelicityTwyla Aurelie (golden twilight)
Twyla FlorisTwyla PhyllisTwyla Sylvie (twilight in the forest)
Floral names aren't easy for me, sorry.