The Fitzgerald/Duval of Western Massachusetts

I have beeen researching both the Fitzgerald/Judge (my father's family) and Duval/Savage (mother's side). Because there is no one on my Father's side alive that has been able to assist me. I do know that my grandfather Fitzgerald left for parts unknown in the 1920's and his first name was William. Grandma Fitzgerald's father last name was Judge and owned a paper mill in Holyoke, MA and was from Count Mayo Ireland. Grandma Judge was from Scotland.
I have more info on my mother's side as I have aunts and uncles that will be able to give me some starting infomation.