From the ArcaMax Publishing, Vocabulary Newsletter:
http://www.arcamax.com/news/vocabulary/s-360480-487775
euphonious \yoo-FOH-nee-uhs\ (adjective) - Pleasing or sweet in sound;
smooth-sounding.
"At twelve-zero-zero Greewich time I had already been introduced to
the Director of the British Museum, whose euphonious and idiotic name
was something like Sir Silage Corn." -- Venedikt Erofeev, 'Moscow to
the End of the Line'
Euphonious comes from Greek euphonos, "sweet-voiced," from eu-, "well"
(hence "sweetly") + phonos, from phone, "voice, sound." The noun form
is euphony.