All the -ara names are simple, pretty and easy to say and spell (and most are not that popular apart from maybe Zara) - Cara, Lara, Mara, Sara, Tara, Zara.
Equally all the -ia names - Gia, Lia/Leah, Mia, Nia, Tia, Xia/Zia. (although Mia is popular).
Also Eden, Rowan, Robin, Ellen, Tamsin, Freda, Cora, Laura, Nina, Mina, Lena, Alva, Elsa, Gaia, Maia, Theia.