Euphony traces back to Greek euphōnía and eúphōnos. Eu and phōnē supplied the idea of a good voice or pleasant sound.
Sources
- Merriam-Webster: euphony
The Greek forms derive from eu- and phōnē, with voice and musical tone senses; the two sections differ in whether French is included.
- Merriam-Webster: eu-
Greek eu means well, from the neuter of a word meaning good.
- Online Etymology Dictionary: saxophone
Saxophone: named for Adolphe Sax, + a musical-instrument ending ultimately from Greek *phōnē* (see -phone: from Greek *phōnē* “voice, sound”)