Lilian Decima, Lady Moore-Guggisberg, CBE, better known by her stage name Decima Moore, was an English singer and actress, known for her performances in soprano roles with the D'Oyly Carte Opera Company and in musical comedies. She was the youngest of ten siblings. Her sister, actress Eva Moore, was the mother of actress Jill Esmond, the first wife of Laurence Olivier.

Eva Moore was an English actress. Her career on stage and in film spanned six decades, and she was active in the women's suffrage movement. In her 1923 book of reminiscences, Exits and Entrances, she describes approximately ninety of her roles in plays, but she continued to act on stage until 1945. She also acted in more than two dozen films. Her daughter, Jill Esmond, was the first wife of Laurence Olivier.