Ifugao indigenous people
I spoke to the woman with my limited Filipino and learned that the two men are her brothers. They are presumed to be in their late 80's and the one furthest on the right may even be in his 90's. Their date of birth is not known because birth records are not kept by the Ifugao.
I confirmed with our tourguide and he said they can be found sitting out at the former offical look out point to make extra money. It also turned out that the older man has a concave nose because of eating a local hallucinagine plant commonly used.

