children of John Spencer, Viscount Althorp (1924–1992), and Frances Spencer, Viscountess Althorp (née Roche; 1936–2004). The Spencer family had been closely allied with the British royal family for several generations; her grandmothers, Cynthia Spencer, Countess Spencer, and Ruth Roche, Baroness Fermoy, had served as ladies-in-waiting to Queen Elizabeth The Queen Mother. Her parents were hoping for a boy to carry on the family line, and no name was chosen for a week until they settled on Diana Frances after her mother and Lady Diana Spencer, a many-times-great-aunt who was also a prospective Princess of Wales. Within the family, she was also known informally as "Duch", a reference to her duchess-like attitude in childhood. On 30 August 1961, Diana was baptised at St. Mary Magdalene Church, Sandringham. She grew up with three siblings: Sarah, Jane, and Charles. Her infant brother, John, died shortly after his birth one year before Diana was born. The desire for an heir added strain to her parents' marriage, and Lady Althorp was sent to Harley Street clinics in London to determine the cause of the "problem". The experience was described as "humiliating" by Diana's younger brother, Charles: "It was a dreadful time for my parents and probably the root of their divorce because I don't think they ever got over it." Diana grew up in Park House, situated on the Sandringham estate. The family leased the house from its owner, Queen Elizabeth II, whom Diana called "Aunt Lilibet" since childhood. The royal family frequently holidayed at the neighbouring Sandringham House, and Diana played with the Queen's sons Prince Andrew and Prince Edward. Diana was seven years old when her parents divorced. Her mother later began a relationship with Peter Shand Kydd and married him in 1969. Diana lived with her mother in London during her parents' separation in 1967, but during that year's Christmas holidays, Lord Althorp refused to let his daughter return to London with Lady Althorp. Shortly afterwards, he won custody of Diana with support from his former mother-in-law, Lady Fermoy. In 1976, Lord Althorp married Raine, Countess of Dartmouth. Diana's relationship with her stepmother was particularly bad. She resented Raine, whom she called a "bully". On one occasion Diana pushed her down the stairs. She later described her childhood as "very unhappy" and "very unstable, the whole thing". She became known as Lady Diana after her father later inherited the title of Earl