Bonnie E. Drozdzik (née DeGroate), age 96, late of Rothschild, WI, formerly of Lake Tomahawk, WI. Beloved wife of the late John Bilthuis and Lawrence Drozdzik; devoted mother of Judy (James) Willhoite, Tena (late Dennis) Johnson, Robert Bilthuis, Clara (Charles) Grizzell, Bonnie (late Rob) (late Steve Toothaker) Watrobka, William (Debbie) Ostrowski, the late John (Lois) Bilthuis, and Carl (Cindy) Bilthuis; proud grandmother of 15, great-grandmother of 38, and great-great-grandmother of 1; dear sister of Katherine Gress and John DeGroate; kind aunt of many nieces and nephews. Visitation Thursday, 3:00 – 9:00 p.m. at Thornridge Funeral Home (Janusz Family Funeral Service) 14318 S. LaGrange Rd. (Northbound traffic: U-turn permitted at 143 ^rd St.), Orland Park. Funeral Friday, 10:00 a.m., meet directly at Chapel Hill Gardens South Cemetery.