I also was reading about the Constellation Pavo (Peacock). All very interesting. Thanks again for sharing this info.
"The number five is cognate with Old Indian panca, Tocharian A pan, Greek pente, etc. Plutarch says "five is analogous partly to the father and partly to the mother, being made up of a triad and dyad. Panta (all) is cognate with pente (five), and they [the ancient Egyptians] say 'to reckon by fives' for 'to count'." A star has five points.
(Jackson 5, Peter Pan)
http://www.constellationsofwords.com/Constellations/Pavo.html