In a roundabout way, Harmonica most likely refers to "harmony" the sound; but the origin of harmony is in the Greek goddess Harmonia.
Clarence S. Hill has written: 'Harmonia harmonica'
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Harmonia antipoda was created in 1835.
Lambertiodes harmonia was created in 1908.
Harmonia Sacra was created in 1832.
Harmonia Macrocosmica was created in 1660.
Harmonia nutans was created in 1935.
Harmonia guggolziorum was created in 2001.
Harmonia stebbinsii was created in 1980.
Harmonia Ensemble was created in 1991.
Harmonia - band - was created in 1973.
the mercury the greek of "melcules"meaning innermost to the sun