I like Aliyah Millecent/Serenity Nadia and Aliya/Serena. I do not, however, like the combination of Taylor and Serenity. I think that Taylor sounds too modern to be paired with Serenity, and I don't think it goes with Aliyah either.
I'm not keen on any of your fns. Some of the names are very pretty though. Millicent and Rosalyn or Rosalyn and Nadia would be nice. I wouldn't mind Nadia and Serena either.