Lalla Miranda was a famous Australian opera singer during the early twentieth century. It appears to have been her real name. Miranda was her real surname. She was of Jewish Sephardic parentage.
"Lalla" was the Royal family's nickname for Mrs. Charlotte Bill, nanny/nurse to Prince John Charles Francis (1905–1919) the youngest son of George V of England and Mary of Teck who suffered from epileptic seizures and Asperger syndrome. She was a spirited no-nonsense woman who was not afraid to speak her mind even to the Queen. She had risen to prominence in the royal household by tattling on the then head nurse who had been subjecting the Royal children to physical abuse. Lalla worked hard to educate Johnnie when everybody else despaired of him making any progress and she was totally shattered by his death at the young age of 14.