The family of Marie-Louise O'Murphy was of Irish origin, settled in Normandy recently. The presence of her paternal grandfather Daniel Murphy is attested in Pont-Audemer at the end of the 17th century, when his first wife Marguerite Connard (Irish like him) died. Militant of the Jacobite army, he followed the deposed King James II of England to his exile in the Château de Saint-Germain-en-Laye; in consequence all the Catholic regiments who remained loyal to the King were sentenced to death "in absentia" by the new English government.