Sir John Lethbridge, 1st Baronet, of Whitehall Place, Westminster; Sandhill Park, Somerset; Westaway in the parish of Pilton, Devon, and Winkleigh Court, Winkleigh, Devon, was Member of Parliament for Minehead in Somerset from 1806 to 1807. He served as Sheriff of Somerset in 1788–9. In 2010 it was discovered that Lethbridge had been the biological father of Claire Clairmont, and thus the grandfather of Clairmont's daughter with Lord Byron, Allegra.

Frances Imlay, also known as Fanny Godwin and Frances Wollstonecraft, was the illegitimate daughter of the British feminist Mary Wollstonecraft and the American commercial speculator and diplomat Gilbert Imlay. Wollstonecraft wrote about her frequently in her later works. Fanny grew up in the household of anarchist political philosopher William Godwin, the widower of her mother, with his second wife Mary Jane Clairmont and their combined family of five children. Fanny's half-sister Mary grew up to write Frankenstein and married Percy Bysshe Shelley, a leading Romantic poet, who composed a poem on Fanny's death.