Nogo and Singo Origins

[David]

Thanks Alan. I think i might have thrown you off the track of my enquiry by using the word "Origin". I do, of course, realize that the terms "nogo" and 'singo" have their origins in Hindu culture. I am not seeking information of the origins of the words. I am attempting to determine when nogo and singo figures began appearing on keris. Clearly, despite the origins in Hindu culture, these figures appearing with some regularity on Islamic era keris. But i can't recall specifically seeing them all that much on keris that have been identified as Mojopahit. So i am trying to understand the timeframe in which they began tio appear.