Margot - don't like it. It's quite different though, I've never met one.
Phoebe - pretty, I like it. And there's always a few around but not too many.
Edie - sweet and pretty but I would use Eden or Edith on the bc
Romy - like it
Iris - like it
Cecily - it's ok. Prefer Cecilia
Sounds like you like old fashioned names that are coming back into common use?
So, how about:
Annie, Alice, Agnes, Audrey, Adele, Andrea, Bessie, Bonnie, Blythe, Bronte, Bridget, Clara, Carla, Cora, Cassie, Connie, Constance, Celeste, Carrie, Cynthia, Celia, Dora, Dilys, Diana, Deirdre, Ellen, Elsie, Elsa, Esme, Enid, Florrie, Frances, Flora, Faith, Gayle, Gloria, Hazel, Hope, Hilary, Ida, Ines, Ivy, Joan, Jane, Josie, Janet, Joy, Joyce, Jocelyn, Jacinth, Judith, Judy, Justine, Kay, Lillian, Lucinda, Mabel, Meg, Mary, Maria, Margaret, Nina, Nancy, Nora, Orla, Olive, Peggy, Polly, Pearl, Posy, Phyllis, Phyllida, Ruth, Rita, Ruby, Rhona, Sorrell, Sylvia, Sylvie, Susan, Sally, Susie, Simone, Stella, Tilly, Tess, Teresa, Trudy, Una, Vera, Winnie, Willa, Wanda, Yvette.