Philip Melanchthon
Philip Melanchthon (born Philipp Schwartzerdt; 16 February 1497 – 19 April 1560) was a German Lutheran reformer, collaborator with Martin Luther, the first systematic theologian of the Protestant Reformation, intellectual leader of the Lutheran Reformation, and an influential designer of educational systems. He stands next to Luther and John Calvin as a reformer, theologian, and molder of Protestantism. After Luther himself, he is the primary founder of Lutheranism.
Philip Monotropos
Phillipos Monotropos or Philippus Solitarius ("Phillip the Recluse"; ; 1080) was a Byzantine monk and writer, notable for his authorship of the "Dioptra" ("The Mirror"), written towards the end of the eleventh century.