There is a total of 21191 clues beginning with si
- Sister of Lazarus
- Sister of Lazarus, in the Bible
- Sister of Linus
- Sister of literature
- Sister of Lucy, Edmund and Peter in the Narnia books
- Sister of Luke
- Sister of Luke, in sci-fi
- Sister of Luna and Sol
- Sister of Lustica in "Born Free"
- Sister of Luther Adler
- Sister of Magda
- Sister of Magda and Eva
- Sister of Magda and Zsa Zsa
- Sister of Maggie and Bart
- Sister of Maggie Simpson
- Sister of Malia
- Sister of Marcia and Cindy Brady
- Sister of Margaux
- Sister of Marge Simpson
- Sister of Mars
- Sister of Masha and Irina
- Sister of Masha and Olga
- Sister of Meg
- Sister of Meg and Beth
- Sister of Meg, Beth and Jo
- Sister of Meg, Jo and Amy
- Sister of Meg, Jo and Beth
- Sister of Meg, Jo, and Amy
- Sister of Melpomene
- Sister of Melpomene
- Sister of Michael and Janet
- Sister of Michael and Janet Jackson
- Sister of Michael and Tito
- Sister of Michael Jackson
- Sister of Mike in "For Better or for Worse"
- Sister of Miss Lulu Bett
- Sister of Moses
- Sister of Moses and Aaron
- Sister of Moses
- Sister of Napoleon
- Sister of Nephthys
- Sister of Nike
- Sister of Nora Ephron
- Sister of Olga and Irina in "Three Sisters"
- Sister of Olga and Masha
- Sister of Olga and Masha, in Chekhov
- Sister of Olga, Tatiana, Maria and Alexei
- Sister of Orestes
- Sister of Orestes
- Sister of Osiris
- Sister of Paris Hilton
- Sister of Patty and Marge
- Sister of Peter
- Sister of Peter Rabbit
- Sister of Peter, Edmund and Lucy in CS Lewis's Narnia stories
- Sister of Phoebe, in myth
- Sister of Pizza Hut
- Sister of Polyhymnia
- Sister of Polyhymnia
- Sister of Poseidon
- Sister of Prince Charles
- Sister of Queen Beatrix of the Netherlands
- Sister of Queen Elsa
- Sister of Rachel
- Sister of Rachel, in the Bible
- Sister of Rachel
- Sister of Regan and Cordelia
- Sister of Regan
- Sister of Rose Red
- Sister of Sasha
- Sister of Sasha Obama
- Sister of Selene
- Sister of Semele
- Sister of Serena
- Sister of Set
- Sister of Snow White
- Sister of Sol and Luna
- Sister of Sol, in myth
- Sister of Stheno and Euryale
- Sister of Tamera, Tahj, and Tavior Mowry
- Sister of Terpsichore
- Sister of Terpsichore
- Sister of Thalia
- Sister of Thalia
- Sister of the "Shrew"
- Sister of the Biography Channel
- Sister of the grand duchess Anastasia
- Sister of the moon goddess Selene
- Sister of the Seawolf
- Sister of Tiffany
- Sister of un oncle
- Sister of Urania
- Sister of Venus
- Sister of Venus Williams
- Sister of Vesuvius
- Sister of your father
- Sister of Zeus
- Sister of Zeus and Poseidon
- Sister of Zeus
- Sister of Zsa Zsa