Paul and Catherine had only the one child, Michael. He was born in 1942, and Paul was killed in 1944. Catherine remarried "Mac" Mewhinney in the late '50s. They had no children. Catherine died in 1994 at 78.
As you may know, Paul and Petrina Mascari had at least three sons, Frank, Michael, and Guy, and four daughters, Josephine (Bova), Anna (Skibosh), Gustie (Augustine?) (Piazza), and Jetta (Jaye) (Steed). Jetta was the last to survive, and died April 17, 2008. Which one was your grandfather or grandmother? I have copies of Paul and Petrina's obituaries I can e-mail you if you'll send me a private message with your e-mail address.