" It only increased Margaret's dislike of her name when young Elizabeth, whom the family called Lilibet, insisted on referring to her baby sister as "Bud". "She's not a real rose yet, is she? She's only a bud." Elizabeth, who was four years Margaret's senior, pertly told Lady Cynthia Asquith. "

― Leslie Carroll , Royal Pains: A Rogues' Gallery of Brats, Brutes, and Bad Seeds