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

Context paragraphs:
Royal Guard of Oman Technical College: Royal Guard Of Oman Technical College and commonly known as RGOTC and it is a public and military college in al Seeb on the governorate of Muscat at the Sultanate of Oman, owned by the Royal Guard of Oman and founded by Sultan Qaboos Al Saeed in order to improve technical and vocational education in the country.

Jordan Royal Guard: Royal Guard Brigade - Hamza Ibn Abd Al-Muttalib (Sayed Al-Shuhada) is a unit of the Jordanian Armed Forces, Royal Guard Brigade is considered the largest, most professional and highly capable brigade in JAF.

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; ] ).

Royal Guard (Bahrain): The Royal Guard (Arabic: الحرس الملكي‎ ‎ ) of Bahrain is a unit of the Bahrain Defence Force.  In June 2011, King Hamad appointed his 24-year-old son Nasser bin Hamad Al Khalifa as the commander of the Royal Guard.

Saudi Royal Guard Regiment: The Saudi Arabian Royal Guard Regiment (Arabic: الحرس الملكي السعودي‎ ‎ Al-Ḥars al-Malakī as-Suʿūdī) is a unit in the Saudi Arabian Army.  Originally an independent military force, the Royal Guards were incorporated into the Army in 1964.  However, the Royal Guards still retained their unique mission of protecting the House of Saud.  Units of the Royal Guard protect the King of Saudi Arabia at all times.

Carin du Rietz: Carin or Karin (Catharina) du Rietz (1766–1788) was a Swedish woman who became a soldier at the Royal guard in the guise of a man.  She was the first woman in the Swedish royal guard.  Her story was a well known and discussed event in her time, and later regarded to exemplify the vivacious Gustavian age.

Royal Guards (Sweden): The Royal Guards (Swedish: "Högvakten" ), the Main Guard at the Stockholm Palace is carried out by units of the Swedish Armed Forces.  It is the King of Sweden's guard of honour and is responsible for the protection of the Swedish Royal Family.  The Royal Guard is normally divided in two parts, the main guard stationed at the Stockholm Palace, and a smaller detachment at Drottningholm Palace.  The Royal Guard traces its history back to the early 16th Century, and the unit has continuously guarded the Royal Palace in Stockholm since 1523.

Royal Guard of Oman: The Royal Guard of Oman (RGO) (Arabic: الحرس السلطاني العماني) is the royal guard of the Sultan of Oman.  It is a separate service within the Sultan's Armed Forces (SAF) and although equipped to carry out land defense operations, it is not part of the Royal Army of Oman.  The RGO is a personal security and ceremonial unit responsible for the protection of the Sultan and other senior members of the Royal Family.  There two other Royal Household partner organizations which directly interface with the RGO, they are:

Royal Guard of the Archers: The Royal Guard of the Archers (Portuguese: "Guarda Real dos Archeiros") was the palace guard of the Portuguese Monarchs from the 16th century until the end of the monarchy in Portugal in 1910.  Its members were armed with halberds, the Guard being also known as the Royal Guard of the Halberdiers (Portuguese: "Guarda Real dos Alabardeiros").

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.

Supporting paragraphs: Dutch grenadiers Louis Bonaparte
Answer: Napoleon I, Emperor of the French