George Sand was a 19th century French novelist and author of the novel 'Isidora', which was published in 1844. The title heroine of the novel is Isidora, who is also known as Isadora or Isira. Isidora is a young woman who is determined to live her life independently and make her own decisions, despite the expectations of society. She is a strong-willed and independent character who stands up for what she believes in. Isidora's story is one of courage and resilience, and serves as an inspiration to readers.