Alexandre Saint-Yves d'Alveydre, French occultist (d. 1909)
Joseph Alexandre Saint-Yves, Marquis d’Alveydre (26 March 1842 – 5 February 1909) was a French occultist who adapted the works of Fabre d'Olivet (1767–1825) and, in turn, had his ideas adapted by Gérard Encausse alias Papus. His work on "L'Archéomètre" deeply influenced the young René Guénon. He developed the term Synarchy—the association of everyone with everyone else—into a political philosophy, and his ideas about this type of government proved influential in politics and the occult.