Around 1161 A.D. General Ambud, a Somavanshi Kshatriya Pathare from Gujarat, from Anhilvaad, tried to attack Mallikarjun Shilahaar and for this settles near Dahanuka river (Dahanu).At the same time Mohamedeans attack Anhilvaad and thus the somavanshi sena stays near Dahanuka .They help Yadavs to conquer North Konkan and defeat Shilahaaras. In return Yadavs accommodate these Somavanshi kshatriyas in Dahanu.
During this period a great saga of Bimbadev Rana starts at Shurparak(Vasai). Bimbadev Rana, was the illustrious son of Kanauj Vidyapur's King Shankardev Rana and Devi Mankoji Bai. After Shankardev, the step brother of Bimbadev named Mahipaal Rana ascends the throne by backing of the Mohamedeans, though Bimbadev was original heir of Shankardev. Thus Mankojbai leaves Kannauj with her son Bimbadev Rana, gets help from her brother Hedurao and King of Sorat(surat) Ankush Rana (whose nation was also facing Mohamedean wrath). All these along came to Devgiri to meet illustrious Ramdevraya. Seeing the valour of Bimbadev Rana, Ramdev hands over the kingdom of Paithan to Bimbadev as his feudal. Bimbadev acquires fame for his able administrative skills. But at the same time, an innocent Brahman was killed by Ramdevrao. This act was condemned by the regional Kings. Even Bimbadev Rana who had highest regard for the meritorious Brahmins now refused to remain as feud of such a King. In such a religious dilemma now Ramdevrav got some support from the "Patane Prabhu" community and some "Palshi Clan", and using the support of these people he continued his kingdom. Seeing this, Bimbadev Rana preferred to leave Paithan and ascend towards Konkana and defeated King Anurodha, feud of Shilahaar on the place of confluence of River Vaitarana and Sindhu Sagara. During this campaign Raja Bimbadev Rana got support from the old Gujarati Somavanshi Kshatriya friends of Hedurao and Raja Ankush Rana, who had settled in Sopara about a century ago. After this campaign, Bimbadev donated 66 villages to his 66 Sardars(Somvanshi Kshatriya) and this was none other than the "Sasti" island. These Somavanshi were known as "Sashtikars". He honoured and released orders in 1204 A.D. that the Somavanshi Kshatriyas are eligible to use "Chattra Sinhasana and 5 Kalashas". Thus since 1204 A.D. these Somavanshi Kshatriya clan (Both from Orissa Somavanshi clan who had settled in Shurparak in 280 A.D. and Gujarati Somavanshi clan) come to be known as "Panchkalshis". But his kingdom does not last long, after his death Shilahaaras took over Shurparak.
1294 A.D. - Bhimdev Yadav starts rule over Shurparak(Vasai) and Mahikavati(Kelve mahim). He established Suryavanshis and Sesha Vanshis in Mahim and Shurparak. Bhimdev also brought Agales (i.e. Agris) from Mungi Paithan in Paithan District on banks of Godavari, who work as Patharvat (Road Makers), Mithagre (Working on Salt Pans). In Portuguese rule Agaris were forced to work as sanitary cleaners by Portuguese. Agris are considered to be clan originating from a Kshatriya Prince Yayati and his maid servant (dasi) Aagalika. Bhimdev Yadav gave a new look to the city of Shurparak. The city comes to a new repute from the educational and cultural point of view. Bhimdev Raja invited 101st Jagadguru Shankaracharya Swami Sukhabodha Tirtha to Shurparak around 1296 A.D. and requested a dharmic justice to purify Anhilvaad Somvanshis assisting them to take Prayashchitta about the abhakshya bhakshana (about eating flesh of horse) during the war with the Mumbai Somvanshis and Mohamedeans.
1350 A.D. - Internal conflict starts between descendants of Bhimdev and Seshvanshi's. The Somavanshis of Anhilvad assist Seshavanshis and defeat Yadav dynasty. Suryavanshis flee to Sashti and Chaul. Now only three clans of kshatriyas left namely Anhilvaad Somavanshi Kshatriyas(panchkalshi), Seshavanshi Kshatriyas and Chaukalshi Kshatriyas.
(Material obtained from many sources including http://onevasai.com/History.aspx, Govind Narayan's Mumbai: an urban biography from 1863 Edited and translated by murali ranganathan )
