Orchid Island (Lan-yu) and the Batanes

Cultural Influence Time Line

Date Start Date End Location Description
Prehistory 1600 BCE Batanes Islands No evidence for a human presence in the Batanes.
1600 BCE 500 BCE Taiwan to Itbayat Island Sunget Phase, prolific evidence for Neolithic settlements from eastern Taiwan, presumably as a part of the same process that lay behing the Neolithic movement from Taiwan to Luzon.
500 BCE 500/ 1000 CE Taiwan to Itbayat Island Naidi Phase, import of slate and jade from Taiwan, the jade being locally manufactured into artifacts at Anaro, combined with continuing cultural diversification between Taiwan and Batanes. The Batanes by this time perhaps remained in frequent contact with northern Luzon, altough precise documentation of this is currently elusive.
1000 CE  1687 Luzon to Itbayat, Batan, Sabtang Rakwaydi Phase, ethnographic Ivatan and Itbayaten cultures. People from Luzon of the Cagyan Valley (Lambak ng Cagayan) migrated bringing a distinct language and culture also.
1300 CE 1700 CE Itbayat to Orchid Island People from Itbayat migrated to Orchid Island. Then around 1700CE Orchid Islanders stop return voyaging in their own boats. 
1783 CE   Philippines to Batan Annexation of Batanes by the Spanish Colonial State in the Philippines. Basco established in Batan as the provincial capital. Batan becomes more populated than Itbayat.
1900 CE Current Batan to Orchid Island In more recent times, people from Batan Island migrate to Orchid Island. 
1990 CE Current Between Batanes and Orchid Island In the past decade trans-Bashi Channel and cross-cultural exchange has increased for research in archaeology, diplomacy at the country/ provincial level, world heritage site proposals and people to people visits.

So there is the big possibilities that people from Ilocos and Northern Philippine provinces decendants came from Yami

Most scholars who have addressed the problem of categorizing Philippine languages have related Umiray Dumaget (DgtU) most closely to other languages spoken by Negritos in northeastern Luzon, languages in the Cordilleran microgroup. Reid suggests (Possible non-Austronesian lexical elements in Philippine Negrito languages, by Lawrence A. Reid, in Oceanic Linguistics 33:37 - 72, 1994) that Umiray Dumaget is not a Cordilleran language but rather that it is relatable to Bikol, a Central Philippine language. While the evidence from phonological changes and the pronominal system does not compel us to favor one subgrouping over the other, the lexical data do show that DgtU is most closely related to the Central Philippine languages. Culturally, we can infer that Umiray Dumaget results from very early contact between the non-Austronesian-speaking Negrito population and speakers of that variety of Central Philippine that evolved into Tagalog, Bikol, and the Bisayan languages. A consequence of this grouping is that any inherited lexeme that Umiray Dumaget shares with non-Central Philippine languages must be assigned to a higher level.