from The Century Dictionary and Cyclopedia
- n. A Javanese musical instrument of the xylophone class, consisting of sixteen strips of resonant wood or metal fastened loosely on strings, and mounted on a concave wooden box or frame. The wooden form is called gambang kayu, the metal form gambang gongso.
Sorry, no etymologies found.
The metal harmonicon is known in Javanese language as the _gambang_, and I have no better name to propose.