OLYMPOS (Olympus) was a mountain-god of Anatolia in Phrygia (modern Turkey). He was an inventor of the flute and the father of flute-playing Satyroi (Satyrs).
The Phrygian Mount Olympos should not be confused with the Thessalian mountain of the same name which was the home of the Olympian gods.
Presumably a son GAIA like the other Mountains
MARSYAS (Apollodorus 1.24, Ovid Metamorphoses 6.382)
CLASSICAL LITERATURE QUOTES
Pseudo-Apollodorus, Bibliotheca 1. 24 (trans. Aldrich) (Greek mythographer C2nd A.D.) :
"Apollon also slew Marsyas, the son of Olympos (Olympus)."
Strabo, Geography 20. 3. 14 (trans. Jones) (Greek geographer C1st B.C. to C1st A.D.) :
"And when they [the poets] bring Seilenos (Silenus) and Marsyas and Olympos (Olympus) into one and the same connection [with Rhea and Dionysos], and make them the historical inventors of flutes, they again, a second time, connect the Dionysiac and the Phrygian rites; and they often in a confused manner drum on Ida and Olympos as the same mountain. Now there are four peaks of Ida called Olympos, near Antandria; and there is also the Mysian Olympos, which indeed borders on Ida, but is not the same."
Ovid, Metamorphoses 6. 392 ff (trans. Melville) (Roman epic C1st B.C. to C1st A.D.) :
"[The satyr Marsyas was flayed alive by the god Apollon :] The countryfolk, the Sylvan Deities (Numina Silvarum), the Fauni (Fauns) [Panes] and brother Satyri (Satyrs) and the Nymphae (Nymphs), were all in tears, Olympus too, still loved."
- Apollodorus, The Library - Greek Mythography C2nd A.D.
- Strabo, Geography - Greek Geography C1st B.C. - C1st A.D.
- Ovid, Metamorphoses - Latin Epic C1st B.C. - C1st A.D.