The Panes (incarnates of Pan who have been around way before the Olympians.)

The Panes are rustic daimones (spirits) of wild mountains and highland pasture, as well as the sheep flocks and goat herds which grazed these lands. They are depicted as goat-footed men, with the tails, bushy beards, snub noses, pointed ears and horns of a goat. Sometimes they are shown with full goat heads. As lascivious fertility spirits they are often depicted with full erections.

The Panes are a multiplication of the Arcadian (Arkadian) god Pan. They are closely associated with the Satyroi, which are depicted with ass tails and ears, as opposed to the goatish features of Pan and Panes.

Names of the Panes.

AIGIPAN - A Pan who helped Zeus in his battles with the monster Typhoeus. He was placed amongst the stars as the Constellation Capricorn.
AGREUS - A Pan god of hunting and rustic prophecy.
NOMIOS - A Pan god of shepherds and pastures.
PAN - The first Pan, a god of shepherds, hunting, rustic music and prophecy.
PANEIDES - (Named KELAINEUS, AGRENNON, AIGIKOROS, EUGENEION, OMESTER, DAPHOINEUS, PHOBOS, PHILAMNOS, XANTHOS, GLAUKOS, ARGOS, PHORBAS, The twelve sons of the primal Pan.)
PAN SYBARIOS - An Italian Pan born when a shepherd coupled with one of his goats.
PHAUNOS (or Faunus) A goat-footed Italian god of the flocks.

(Info from www.theoi.com)
Art - by Johfra Bosschart