The Head of the Seventh Ray is the Master the Comte de St. Germain, known to history in the eighteenth century, whom we sometimes call the Master Rakoczy, as he is the last survivor of that royal house. He was Francis Bacon, Lord Verulam, in the seventeenth century, Robertus the monk in the sixteenth, Hunyadi Janos in the fifteenth, Christian Rosenkreuz in the fourteenth, and Roger Bacon in the thirteenth; he is the Hungarian Adept of The Occult World. Further back in time he was the great Neoplatonist Proclus and before that St. Alban. p. 258
source
C. W. Leadbeater in [https://www.theosophy.world/sites/default/files/ebooks/MastersandthePath.pdf The Masters and the Path] (1925)