Hello! This is so amazing! My grandfather, Jesus, was raised in Betis, Pampanga (born in 1916). I believe his father's name was Mateo and for some reason, Modesto rings a bell. They also have relatives in Tarlac. I was born in Betis, but we moved to California when I was 6. There are a ton of us here in Caliornia (Daly City).
Tell me, does your family have mostly light skin, curly hair, and light eyebrows? I ask this question because I've found that most Sahaguns have these trademarks, especially the kinky curly hair.
Any additional information you guys can share would be great!