Michael Higgins of the WWII Genforums was kind enough to help with research on several of the next entries.
Martin C. Monahan Jr.
Social Security Death Index
Name: Martin C. Monahan Born: 27 Mar 1915 Died: 14 Aug 1991 State (Year) SSN issued: New York (Before 1951)
Name: Martin C Jr Monahan Service Info.: CW03 US ARMY WORLD WAR II, KOREA
Birth Date: 27 Mar 1915
Death Date: 14 Aug 1991 Service Start Date: 21 Aug 1942 Interment Date: 19 Aug 1991 Cemetery: Ft. Bliss National Cemetery Cemetery Address: P.O. Box 6342 5200 Fred Wilson Street Fort Bliss, TX 77906 Buried At: Section H1 Site 1926
The last address my grandfather has listed on the reunion sheet is:
26 Koenig Lane, Freehold NJ 07728
The letter says that "Five men and their wives attended..." but doesn't say if Marty brought a wife, was married or had children. He's one of the few who did not send a bio (probably because he attended in person). Maybe this will sound familiar to someone out there.