WordNet sense 1 (a celebrity who is lionized (much sought after)):

social lion

WordNet sense 2 ((astrology) a person who is born while the sun is in Leo):

Leo

WordNet sense 3 (the fifth sign of the zodiac; the sun is in this sign from about July 23 to August 22):

Leo the Lion

WordNet sense 4 (large gregarious predatory feline of Africa and India having a tawny coat with a shaggy mane in the male):

king of beasts, Panthera leo