Ptolemy, son of Philip (Greek: Πτολεμαῖος ὁ Φιλίππου) was an officer who commanded the leading squadron of Macedonian cavalry (that of Socrates) at the Battle of the Granicus.^[1] Both Gronovius^[2] and Droysen,^{[citation needed]} suppose that he is the same man that Alexander left with a force of 3,000 infantry and 200 cavalry to defend the province of Caria, and who subsequently, together with Asander the governor of Lydia, defeated the Persian general Orontobates, 332 BC.^[3]

• Who's Who in the Age of Alexander the Great by Waldemar Heckel ISBN 978-1-4051-1210-9

 This article incorporates text from a publication now in the public domain: Bunbury, Edward Herbert (1870). "Ptolemaeus (minor historical persons)". In Smith, William (ed.). Dictionary of Greek and Roman Biography and Mythology. Vol. 3. p. 565.