I have some information-which I'm still looking for more.Your grandmother Mary is my husband's grandfather's brother. His name is: John Francis b 27 Nov 1923 Marlborough, Plymouth Co., MA m Elizabeth Jean Crews
I show that he had a sister Mary (yours) and sister Irene.
Their parents: Mary Sylvia Rego b ? In Azores m John Bothello Mello b 24 June 1901 in Stonington, New London Co., CT