Louis Gabriel Oscar Grimaldi, Marquis of Baux, (June 8, 1814 – July 14, 1894) was the illegitimate son of Prince Honoré V of Monaco and his mistress Félicité de Gamaches.
Biography Louis Gabriel Oscar Grimaldi was born to unknown parents in Paris, at 15 rue Bonaparte, in the former 10th arrondissement, on June 8, 1814.
A few months after his birth, on November 28, 1814, he was acknowledged by Prince Honoré V of Monaco before Alexandre Toussaint Delacour, a notary in Paris, with his legitimisation, Oscar was bestowed the Grimaldi surname, however, because he was born out of wedlock, meant that he would never succeed as Prince of Monaco. His maternal lineage remained officially undetermined until his death.
A law graduate and lawyer at the Paris Court of Appeal, he then pursued a career in the French administration: he was attached to the Ministry of the Interior, Litigation Division (1842), deputy head of the office in the Finance Division in Algeria (1846), and then to the Directorate of Civil Affairs in Algiers (1847–1848).
The remainder of his career was spent in the prefectoral administration, serving as sub-prefect of Lille (1853–1856), sub-prefect of Castres (1856–1861), sub-prefect of Chalon-sur-Saône (1861–1870), before retiring in 1870.
In 1860, his first cousin, Prince Charles III of Monaco, bestowed upon him the title of Marquis of Baux, a title not recognized in France.
The French state made him a Knight of the Legion of Honour on November 10, 1852, and he was promoted to Officer on August 11, 1864.
He died unmarried and without issue in Saint-Germain-en-Laye on July 14, 1894. He was buried at Château de Fontaine-Française.
The question of his parentage addressed by the authors.
According to Albert Révérend In the Titles, ennoblements and peerages of the Restoration, Viscount Albert Révérend mentions the existence of the natural son of Honoré V of Monaco, without giving any indication or hypothesis as to the maternal filiation of the latter.
According to Henry de Woelmont de Brumagne In the fifth series of his Genealogical Notices , Woelmont mentions, without indicating his sources, that Félicité Madeleine Honorée Gabrielle Rouault de Gamaches (20 Apr 1781 – 13 Jul 1819), then wife of Jacques Philippe Achille Louis Auguste Barthélémy François, Count of Héricy (1775 – 1842), is the mother of the Marquis des Baux, natural son of the Duke of Valentinois (the future Honoré V).Baron de Woelmont de Brumagne, Notices généalogiques : cinquième série, Paris, Librairie ancienne Edouard Champion, 1927, 1150 p., pp. 563-564
According to Jean-Fred Tourtchine Natural child born to Félicité Pronault de Gamaches.
According to Denis Grando In his essay on Camille de La Vincelle, bastard of Honoré III Prince of Monaco , Denis Grando reproduces verbatim the documents relating to the civil status of Oscar Grimaldi, his birth, recognition and death certificates, his service records, without giving any indication or hypothesis as to his maternal filiation.
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