The kenda is basically a bowed ektar that is found among the Mundas of East India. It is very similar to the pena, bana, or bena, found in North East North East India.
Other Sites of Interest
India : North Indian folk music
How Does Music mean? Embodied Memories and the Politics of Affect in the Indian Sarangi
Bowed strings and sympathy, from violins to indian sarangis
Let's Know Music and Musical Instruments of India
Master Musicians of India: Hereditary Sarangi Players Speak
The North Indian Classical Sarangi: Its Technique and Role
Kamanche, the Bowed String Instrument of the Orient
The Acoustic Dynamics of Bridges of Bowed Instruments (An Outline of Comparative Instrument-Making)
The Natural History of the Musical Bow