I love Rose as a first name...a wonderful, strong, feminine, timeless name.
I prefer it as a given name, but also like it as a nickname. My favorite full names for it are Rosemary and Rosalie.
Some sibling suggestions: Ada, Adele, Alice, Anna, Cecily, Charlotte, Clara, Cora, Delia, Eleanor, Lenore, Lydia, Arthur, Duncan, Henry, Thomas...
These are the Rose combos on my list: Rose Adelaide, Rose Adele, Rose Agatha, Rose Alethea, Rose Althea, Rose Amabel, Rose Amandine, Rose Amélie, Rose Annebet, Rose Anthea, Rose Anwen, Rose Beatrice, Rose Beatrix, Rose Bronwen, Rose Caroline, Rose Catherine, Rose Catrin, Rose Cecilia, Rose Celestine, Rose Charlotte, Rose Chrysanthe, Rose Clarimonde, Rose Corisande, Rose Delphine, Rose Delphinia, Rose Edwina, Rose Eleanor, Rose Eleanora, Rose Eleonora, Rose Elowen, Rose Elspeth, Rose Emeline, Rose Emmeline, Rose Eugenia, Rose Eugenie, Rose Evadne, Rose Evanthe, Rose Fortunata, Rose Frances, Rose Genevieve, Rose Georgiana, Rose Georgina, Rose Geraldine, Rose Glynis, Rose Gwendolen, Rose Hannelore, Rose Helene, Rose Hesper, Rose Jemima, Rose Juliet, Rose Julietta, Rose Katherine, Rose Katriel, Rose Katrin, Rose Lenore, Rose Leonora, Rose Lorelei, Rose Lucille, Rose Margareta, Rose Marguerite, Rose Mariam, Rose Marianne, Rose Maribel, Rose Martine, Rose Mathilde, Rose Maxine, Rose Melisande, Rose Millicent, Rose Nimue, Rose Octavia, Rose Philippa, Rose Tallulah, Rose Tatienne, Rose Tehani, Rose Thandiwe, Rose Tullia, Rose Undine, Rose Victoria, Rose Virginie, Rose Viviane, Rose Vivienne, Rose Winifred.