David Wilfrid Kosak Obituary
It is with deep sorrow that we announce the death of David Wilfrid Kosak (Reedsburg, Wisconsin), who passed away on July 8, 2025, at the age of 68, leaving to mourn family and friends. You can send your sympathy in the guestbook provided and share it with the family.
He was predeceased by: his parents, Wilfrid Kosak and June Kosak (Rose); and his siblings, John Kosak and Jean Read. He is survived by: his wife Kathy (Kathy); his children, Crystal Diederich-Kosak (Kyle) and Christopher Kosak; his siblings, Dan Kosak (Patti), Jim Kosak, Terri Knutson, Mary Seering (Jeff), Linda Kosak, Lori Kosak, Kathy Kosak and Barbara Kosak-Schlaefer; and his in-laws, Ed Fitzgerald (Gerry Ann), Dan Fitzgerald (Pat), Terri Radke (Pete), Peg Schluter (Jerry), Kristy Kasten Gary and Kelley BonDurant (Matt).
