Arsinoe was of the Argead dynasty, and originally a concubine of Philip II, king of Macedon, and it is said she was given by Philip to Lagus, a Macedonian nobleman, while she was pregnant with Ptolemy I Soter, but it is possible that this is a later myth fabricated to glorify the Ptolemaic Dynasty.[1] Alternately, Ptolemy's lineage to the Argead dynasty was found through his mother, Arsinoe, in this case Arsinoe is daughter of Meleager, who was a cousin of Amyntas III and son of Balacrus, son of Amyntas, son of Alexander I of Macedon. Contemporary and modern research concludes the latter claim much more valid than Philip II as Ptolemy’s father, now dismissed as a myth.[2][3][4][5][6]