Your grandfather was the brother of my husband's great grandmother Antonina (Nina)! I have been trying to research his family tree for him, and it has been difficult. Antonina had a very interesting life. VERY...
While in Braintree, most of the family (at least the males) worked at Slater & Morrill shoe factory. Tons of Sicilian and Italian immigrants worked there. I will see if my husband's grandparents can recall anything about Angelo. I can tell you that Antonina lived to 98 years old, and had her scrupples for the most part. Feel free to message me directly. Most of what I know is in my Cristiani Family Tree.
Thanks,
Anna