in local limbu dialect bow is still called 'li', the tribes only with thier different clan names after sucessfully revolting against the rulers decided to collectively form a name 'limbu' in the area east of arun river and west of sikkim. the social structure then was still homogenous; the social norms, rules and regulations were developed, which has evolved as a culture and rituals to this day. the region was restructred as 10 limbu and 17 thum, even today when a limbu priest fedengma performs sum rituals he starts by saying 'as per the rules of 10 limbu and 17 thum...' and bow is present in most of the rituals. it was feudal structure with independent 10 ruling states and bijaypur being the main administrative region. the states name like tambar, phedap, panthar, chathar, etc was in existence, till now limbu uses the term as phedape limbu or chathare limbu or panthare limbu from the region of thier origin. only couple of states made an alliance with sikkim since they didnt agree with the terms of gorkha but many other agreed and came under the house of gorkha. they have mentioned this region as pallo kirat, it is evident enough to understand the existence of nationhood, it was ceded in 1774 way before british made to north and an interest in these region who were engaging with tipu sultan far south meanwhile sikkim was still an independent kingdom when british arrived. the people of that region started using the surname 'limbu' after the annexation in modern nepal, before only clan names were used like nembang, chemjong, etc.  the sikkimese calls the people of limbu origin as tsong like yakthumba in thier own local dialect, they hav significant number in sikkim living from long generations till now,  in fact there is cultural similarities between limbu and lepchas. sikkim is the only place where limbu language is taught in thier university. pawan chamling is 'rai', he has done great work for sikkim. the history of the region is in presence within the people only, in thier lifestyle, cultural and religious practices. buda subba being one of them, it is actually the grave of last limbu king of bijaypur.