Question: Who was the older brother of person whose guard formed the French Royal Guard?

full_context: Document 1: United Kingdom of the Netherlands: The United Kingdom of the Netherlands (Dutch: "Verenigd Koninkrijk der Nederlanden" , French: "Royaume uni des Pays-Bas" ) is the unofficial name given to the Kingdom of the Netherlands as it existed between 1815 and 1830.
Document 2: William I of the Netherlands: William I (Willem Frederik, Prince of Orange-Nassau; 24 August 1772 – 12 December 1843) was a Prince of Orange and the first King of the Netherlands and Grand Duke of Luxembourg.
Document 3: Louis Bonaparte: Louis Napoléon Bonaparte (born Luigi Buonaparte; 2 September 1778 – 25 July 1846) was a younger brother of Napoleon I, Emperor of the French. He was a monarch in his own right from 1806 to 1810, ruling over the Kingdom of Holland (a French client state roughly corresponding to the current Netherlands). In that capacity he was known as Louis I (Dutch: Lodewijk I; ] ).
Document 4: Louis Joseph, Dauphin of France: Louis Joseph de France (Louis Joseph Xavier François; 22 October 1781 – 4 June 1789) was the second child and elder son of King Louis XVI of France and Marie Antoinette. As son of a king of France, he was a "fils de France" ("Son of France"), and as the eldest son and heir apparent, he was Dauphin of France, (the twenty-sixth "crown prince" of the Capetian and Bourbon monarchies).
Document 5: Leopold I of Belgium: Leopold I (French: "Léopold I" , German and Dutch: "Leopold I" ; 16 December 1790 in Coburg – 10 December 1865 in Laeken) was a German prince who became the first King of the Belgians following Belgian independence in 1830. He reigned between July 1831 and December 1865.
Document 6: III Corps (Grande Armée): The III Corps of the Grande Armée was the designation of a few military units during the Napoleonic Wars. The III Corps came to prominence between 1805 and 1809 under the command of Marshal Louis-Nicolas Davout, when it repeatedly scored impressive victories single-handedly or in conjunction with other French forces. Napoleon called it ""My tenth legion"", in reference to Julius Caesar's finest unit, the X Equestris. Then troops from that Corps took part in many battles in Poland (1807) e.g. Czarnowo, Pultusk, Golymin, Eylau, in Bavaria at Teugen-Hausen, Eckmuhl and in Austria 1809 at Wagram. These troops later were reorganized as I Corps and included French, German/Polish units. It also included the 127th to 129th ""régiment d'infanterie de ligne"" from the north German countries of Oldenburg, Bremen and Hamburg that were annexed shortly before and thus counted as French.
Document 7: Grenadier: A grenadier (from French, derived from the word grenade) was originally a specialized soldier, first established as a distinct role in the mid-to-late 17th century, for the throwing of grenades and sometimes assault operations. At that time grenadiers were chosen from the strongest and largest soldiers. By the 18th century, dedicated grenade throwing of this sort was no longer relevant, but grenadiers were still chosen for being the most physically powerful soldiers and would lead assaults in the field of battle. Grenadiers would also often lead the storming of fortification breaches in siege warfare, although this role was more usually fulfilled by all-arm units of volunteers called forlorn hopes, and might also be fulfilled by sappers or pioneers.
Document 8: Swiss Guards: Swiss Guards (French: "Gardes Suisses" ; German: "Schweizergarde" ) are the Swiss soldiers who have served as guards at foreign European courts since the late 15th century.
Document 9: I Cavalry Corps (Grande Armée): I Cavalry Corps (Grande Armée) was a French military formation that existed during the Napoleonic Wars. For one month in 1806–1807, Emperor Napoleon split his Reserve Cavalry Corps into the I and II Cavalry Corps. At that time, Marshal Joachim Murat took command of the short-lived I Cavalry Corps before resuming leadership over Napoleon's Reserve Cavalry when the experiment ended. The I Cavalry Corps was not recreated until 1812 for the French invasion of Russia when command was exercised by Étienne Marie Antoine Champion de Nansouty. The formation fought at Borodino and Tarutino. After being destroyed during the retreat from Russia, I Cavalry Corps was reconstituted in 1813 and Marie Victor de Fay, marquis de Latour-Maubourg was appointed to lead it. The corps fought at Lutzen, Bautzen, Dresden, and Leipzig. At Leipzig, Latour-Maubourg was seriously wounded and replaced by Jean-Pierre Doumerc who led the corps for the remainder of the War of the Sixth Coalition which ended with Napoleon's abdication in 1814. After Napoleon returned from exile and retook power in France in 1815, the main French army was baptised Armée du Nord. The army included a I Cavalry Corps led by Pierre Claude Pajol which fought at Ligny and Wavre, while one detached division fought at Waterloo.
Document 10: History of the French Foreign Legion: The French Foreign Legion has had a long and unique history amongst the units of the French Army. The French Foreign Legion was historically formed of expatriate enlisted personnel led by French officers. Founded by a royal ordinance issued by King Louis Philippe of France on March 9, 1831 with aim of bolstering the strength of the French Army while also finding a use for the influx of refugees inundating France at the time. The Foreign Legion subsequently found a permanent home in the ranks of the French military. The Foreign Legion's history spans across Conquest of Algeria, the Franco-Prussian War, numerous colonial exploits, both World Wars, the First Indochina War, and the Algerian War.
Document 11: Charlotte Bonaparte: Charlotte Napoléone Bonaparte (31 October 1802 – 2 March 1839) was the daughter of Joseph Bonaparte, the older brother of Emperor Napoleon I, and Julie Clary. Her mother was the sister of Désirée Clary, Napoleon's first love. Charlotte married her first cousin Napoleon Louis, the second son of Louis Bonaparte and Hortense de Beauharnais. She studied engraving and lithography in Paris with the artist Louis Léopold Robert, who is reputed to have fallen in love with her.
Document 12: Lucien Murat: Lucien Charles Joseph Napoléon, Prince Français, Prince of Naples, 2nd Prince de Pontecorvo, 3rd Prince Murat (16 May 1803, Milan – 10 April 1878, Paris) was a French politician, and the sovereign Prince of Pontecorvo between 1812 and May 1815.
Document 13: Napoleon: Napoléon Bonaparte ( ; ] ; 15 August 1769 – 5 May 1821) was a French military and political leader who rose to prominence during the French Revolution and led several successful campaigns during the French Revolutionary Wars. As Napoleon I, he was Emperor of the French from 1804 until 1814, and again briefly in 1815 (during the Hundred Days). Napoleon dominated European and global affairs for more than a decade while leading France against a series of coalitions in the Napoleonic Wars. He won most of these wars and the vast majority of his battles, building a large empire that ruled over continental Europe before its final collapse in 1815. One of the greatest commanders in history, his wars and campaigns are studied at military schools worldwide. Napoleon's political and cultural legacy has endured as one of the most celebrated and controversial leaders in human history.
Document 14: VI Corps (Grande Armée): The VI Corps of the "Grande Armée" was the name of a French military unit that existed during the Napoleonic Wars. It was formed at the Camp de Boulogne and assigned to Marshal Michel Ney. From 1805 through 1811, the army corps fought under Ney's command in the War of the Third Coalition, the War of the Fourth Coalition, and the Peninsular War. Jean Gabriel Marchand was in charge of the corps for a period when Ney went on leave. In early 1811, Ney was dismissed by Marshal André Masséna for disobedience and the corps was briefly led by Louis Henri Loison until the corps was dissolved in May 1811. The VI Corps was revived in 1812 for the French invasion of Russia and placed under Laurent Gouvion Saint-Cyr. It entirely consisted of Bavarian soldiers at that time. After the disastrous winter retreat the corps was virtually destroyed. In 1813 during the War of the Sixth Coalition it was recreated with reorganized French troops. Marshal Auguste Marmont took command of the corps and managed it until Emperor Napoleon's abdication in 1814. It took part in many battles including Dresden and Leipzig in 1813. During the Hundred Days, Georges Mouton, Count de Lobau commanded the VI Corps at the Battle of Waterloo.
Document 15: Dutch grenadiers: The Dutch grenadiers were a French guard regiment from 1810 until 1813. They were originally formed out of Louis Bonaparte's Royal guard.
ground_truth: Napoleon I, Emperor of the French