Monsieur le Comte de St. Germain had an ordinary birth, circa 1690, and was the son of Prince Ragoczy, of Transylvania. He adopted the pseudonym “Sanctus Germano” in his youth.
Thus reads the description for my latest video, “Origins of Count St. Germain”, published to YouTube on April 5, 2017. The clip, which clocks in at 5 minutes and 19 seconds, can hopefully be viewed at the top of today’s blog entry.
International man of mystery, he was Monsieur le Comte de St. Germain! He is praised to the skies by some, and scoffed at by others. Various fables about St. Germain, such as that he was hundreds of years old, serve as a smoke screen which hides the truth about this remarkable man.
St. Germain was favored by King Louis XV, King of France from 1715 (at the age of 5 years old) until his death in 1774. King Louis XV “repeatedly declared that he would not tolerate any mockery of the Count, who was of high birth.” But this royal favor towards St. Germain caused the Prime Minister, the Duc de Choiseul, to eventually become a bitter enemy of St. Germain. 
It is most likely that St. Germain was really Franz-Leopold, son of Prince Ragoczy, of Transylvania. The true story seems to be that St. Germain was the son of Prince Ragoczy of Transylvania by his first wife and that he was placed, when quite young, under the care of the Duc de Medici.  (Being from Transylvania reminds us of another Count, also from Transylvania.)
St. Germain had two half-brothers, sons of the Princess of Hesse-Wahnfried. (She was apparently the second wife of the prince, after the first wife, “a Tékéli”, had died.) Living separately, under care of the Duc de Medici, the young Count learned that his two half-brothers had received royal titles. In jealousy of these two half-brothers, the young Count decided to call himself Sanctus Germano, the Holy Brother. (From the Latin, Germanus, meaning “of brothers and sisters”.) And this is how he acquired the pseudonym, “St. Germain.” 
This “Holy Brother” was “tremendously protected by the Duc de Medici.”  And the Medici family were a major banking house in Italy, which may explain how Monsieur le Comte de St. Germain always had plenty of money, yet had not much of it when he died. (The fable is that through alchemy the Count could transmute base metals into gold.)
——- Sources ——-
 The Comte de St. Germain, by Isabel Cooper-Oakley (1912). Republished by ForgottenBooks.org