Leo the Lion is one of the earliest recognized constellations. The Mesopotamians are known to have documented the âlionâ constellation. The Persians called it Ser or Shir; the Turks, Artan; the Syrians, Aryo; the Jewish, Arye; the Indians, Simha.These are all translated as âlion.â. Hunting the lion.strology is not a science, but Leo is one of the 13 constellations of the Zodiac. Leo is the fifth sign of the Zodiac and represents those born July 22 to August 22. It is considered a masculine, extroverted sign.