There were large scale commercial activity in ancient days from Adilabad district to Rajahmundry through the Khammam district.The River Godhavari had helped in this regard by flowing in full length, allowing the river route commerce from there.
For instance, kotilingala is an ancient town and initial capital of shatavahanas.It is on the bank of river GodhavariThere are many villages are existing on the name of kotilingal starting from Khammam district .Also , there is one kotilingala ghat(bank) on Godhavari in Rajahmundry.There were many kotilingala temples established throughout the shatavahana area.Temples in ancient period was worked for many purposes , including as bank,educational, health centre.Thus, it clearly proves that kotilingala people migrated to many areas for commercial activities and spread their culture in those places.
As per the Historians, Maghastenese, a famous Greek traveler has made a mention of Kotilingala and its fort in his book Indica.
Above information reveals three things. Firstly,flourishing business relations and dominance of Adilabad and karimnagar people with other area people ,including coastal area .secondly,The migrations and establishing villages by these people in other areas for various reasons , including commerce.Thirdly, it proves the full flow of river Godhavari starting from kotilingala to Rajahmundry,allowing the river navigation.
In addition to kotilingala in Khammam district in mandal, there are villages on the name of Rayapatnam (in madhira mandal,just about 5 k.m away from madhira )and Jannaram.Originally, Rayapatnam is a famous village on the bank of river Godhavari in Dharmapuri mandal,but it is very close to luxettipet in Adilabad district.Similarly, Jannaram is in enkoor mandal,on the way to kothagudem from khammam.Originally, Jannaram is a mandal in adilabad district, near to the tributary of godhavari, by name kaddam. If the people of jannaram too have the commercial relations with other places through the river route, then tributeries of river godhavari would have flowing in such a way that it allowed the navigation.Due to the commercial relations they would have established villages in Khammam district. Another interesting point about above two villages is that these are at crossroads, connecting many routes and halting points to buses, vehicles, during the journey in Adilabad and karimnagar districts.
One other village by name chennuru is also existing in kalluru mandal in Khammam district.Originally, Chennuru is a famous and oldest town on the bank of river godhavari. Surrounding villages of chennuru was famous for iron ore in olden days.This might have created commercial relations with the distant places on the river route.People of chennuru are believed intelligent in Adilabad district.In the present period, people of chennuru have established their colonies with chennuru as prefix in hyderabad and some other places.
Thus, there was trade flourishing from Adilabad and karimnagar districts to coastal areas through the river route from khammam and led to establishment of settlements of both district people in Khammam and other districts.