What about Clarice
Beatrice, Iris, Rose and Clarice sound really nice together.
Beatrice, Iris, Rose and Amelie
Beatrice, Iris, Rose and Evelyn - Beattie, Iris, Rosie, Evie
Beatrice, Iris, Rose and Alice
Beatrice, Iris Rose and Mildred - Beattie, Iris, Rosie, Millie
Beatrice, Iris, Rose and Edith - Like this combo - Beattie, Iris, Rosie and Edie
Beatrice, Iris, Rose and Dorothea - Beattie, Iris, Rose and Dottie
Beatrice, Iris, Rose and Elodie
Beatrice, Iris, Rose and Elsie/Elsa
Beatrice, Iris, Rose and Minnie