Sir Percy Florence Shelley, 3rd Baronet of Castle Goring (12 November 1819 – 5 December 1889) was the son and only surviving child of Percy Bysshe Shelley and his second wife, Mary Shelley. He was thus the only grandchild of Mary Wollstonecraft to live beyond infancy. His middle name, Florence, came because he was born in Florence in Italy.
The couple had no children, although they adopted Bessie Florence Gibson, the daughter of Edward Gibson who was possibly Jane Gibson's brother. Bessie Gibson married Lieutenant-Colonel Leopold James Yorke Campbell Scarlett, and was the mother of Shelley, Robert and Hugh Scarlett, the 5th, 6th and 7th Barons Abinger respectively.