However, there is no clear consensus on what you mean by "Shelley siblings."
Here are some possibilities:
* Percy Shelley's siblings: He had two siblings:
* John Shelley (1792-1866): John was the eldest brother and served as a Member of Parliament.
* Elizabeth Shelley (1794-1872): Elizabeth was the younger sister and a writer herself, though less famous than her brother.
* Mary Shelley's siblings: Mary Shelley, Percy Shelley's second wife, was the daughter of William Godwin and Mary Wollstonecraft. Her siblings include:
* Fanny Imlay (1794-1816): Fanny was Mary's half-sister from her mother's previous relationship.
* Claire Clairmont (1798-1879): Claire was Mary's step-sister, also from her mother's previous relationship.
If you have more context or specifics about which "Shelley siblings" you are interested in, please provide more information so I can help you further.