DUGGAN - John J. Ph.D. September 13, 1963 - January 14, 2026 Of Lackawanna, NY. Beloved husband of Cherith E. (Nixon) Duggan; loving son of the late John W. and Maureen H. (Crean) Duggan; brother of Colleen M. (Dr. David) Mazgaj and Michael D. Mitskoff; also survived by nieces, nephews, cousins and many beloved friends. Family and friends will be present Wednesday, January 21, 2026 from 4-7 PM for a Celebration of Life Gathering at the CASTIGLIA FUNERAL HOME, INC., 873 Abbott Rd., South Buffalo, NY, (716) 824-6435, where a Funeral Service will be held at 6:30 PM. John was a Chaplain for Cowboys for Christ. In lieu of flowers, memorial contributions may be made to Cowboys for Christ. Please share your condolences at: www.castigliafuneralhome.com