Bohol was first settled by the Eskaya tribe who still inhabit the island today. Their population also was absorbed into the Austronesian/Malayo-Polynesian peoples who later settled the islands and form the majority of the population. The Austronesian people living on Bohol traded with other islands in the Philippines and as far as China and Borneo.
The people of Bohol are said to be the descendants of a group of inhabitants who settled in the Philippines called pintados or “tattooed ones.” Boholanos already had a culture of their own as evidenced by artifacts unearthed at Mansasa, Tagbilaran, and in Dauis and Panglao.
Source : https://en.wikipedia.org/wiki/Bohol