mavis (n.)

"the song thrush," a well-known bird common in most parts of Europe, c. 1400, mavys, from Old French mauvis, of unknown origin; related to Spanish malvis, Italian malviccio. Breton milfid is a French loan word. Also used as a fem. proper name.

It haunts gardens and woods near streams and meadows. Its song is sweet and has considerable compass; it can be made to repeat musical airs, and in some instances to articulate words. This name, still common in Scotland, is now rare in England. [Century Dictionary, 1897]