This is the same story I’ve heard about my Alvarez roots. Several Alvarez brothers were said to have migrated to the Philippines, settled in Cavite, then two went to Bicol, establishing our branch. Looking for proof of this.
I also connected with Alvarezes in Cebu who say we are all related but that it’s pretty messy and complicated, as you implied.
Would appreciate any information you might find. There are Alvarezes here in the US, half white, half Pinoy, who are also seeking information.