Roustam Raza (as modern spelling has it) was Napoleon's personal bodyguard. Born in Tbilisi in Georgia to Armenian parents, Roustam was sold as a slave at the age of thirteen. He became a mamluk (mameluke), meaning a soldier-slave, a powerful military and political force in the Muslim world, particularly in Egypt. After the defeat of the Ottomans in Egypt, the sheikh offered Roustam to Napoleon as a bodyguard. He served Napoleon until his fall in 1814, by which time he had married a Frenchwoman, Mademoiselle Douville and settled in Dourdan, where he died in 1845. He wrote a memoir of his time with Napoleon, but it does not seem to have been translated into English. You can read it online in Russian here.