Her father was Étienne Pinon, a bank clerk from a family with Royalist connections, who married Jeanne Catherine, née Tauzin, the daughter of a coach-builder, in Paris in 1791.
It is on that voyage he would have been aware of his leader Nicolas Baudin's meeting with Matthew Flinders and of their virtually simultaneous proving that New Holland of the Dutch and New South Wales of Cook was part of one island continent Australia.
Displaying considerable cartographic skill, when Baudin's second ship was sent home under Jacques Hamelin laden with specimens and records, de Freycinet was elevated above others to command Casuarina, a small vessel purchased in order to continue the surveys.
After the death of both Baudin and the voyage anthropologist François Peron who attempted to complete the account, and finalising an account of the voyage, in 1817 he was given command of the Uranie on an expedition under the auspices of the French Navy and the Ministry of the Interior, in which Louis Isidore Duperrey, Jacques Arago, Adrien Taunay the Younger, and others went to Rio de Janeiro to perform various scientific measurements and to collect specimens in natural history.
Rose Pinon and he were newly wed; perhaps aware of Flinder's imprisonment and his enforced separation from his wife Ann, they conspired to avoid a similar fate aboard.
[1] The expedition brought back a great number of scientific specimens, including minerals, plants, insects, animals, despite the shipwreck of the Uranie in 1820 in the Falkland Islands.