PETERSON - William F. Sr. January 13, 1939 - April 5, 2026 Of South Buffalo, NY. Beloved husband of the late Helen G. (Yates) Peterson; dearest father of William F. Jr. (Amy C.) and Ronald A. Peterson; grandfather of Dr. Elizabeth (Nicholas) Williams, Caroline Peterson (Michael Wilson), William (Kayla) Peterson III and Andrew Peterson; great-grandfather of Maria and William IV; loving son of the late John M. and Hazel I. (Irons) Peterson; brother of John (Phyllis) Peterson. No prior visitation. Family and friends are invited to attend a Celebration of Life Gathering at The White Inn, 52 E. Main Rd., Fredonia, NY, Saturday, May 2, 2026 at 12 Noon. Mr. Peterson was a U.S. Air Force Veteran of the Vietnam Era. Arrangements by: CASTIGLIA FUNERAL HOME, INC., 873 Abbott Rd., South Buffalo, NY, (716) 824-6435. Please share your condolences at: www.castigliafuneralhome.com