Anyone researching de Mello Castanho of Fall River, MA?

My de Mello's were from Maia, Ribeira Grande, Sao Miguel Island, Azores. Around 1830, they tacked on Castanho to their surname. All the de Mello Castanho's of Maia are related to my family in some way.

I've found that several de Mello Castanho's made their way to Fall River, MA between 1900-1910. I've been trying to sort them all out.

If anyone has this surname, I'd like to hear from you. Thanks!