Mary A. Prostek (nee Tiedeman) passed away on May 23, 2018. Beloved wife of the late Joseph and loving sister of the late John (Karen) Tiedemann, Fran (Don) Oelke and Joe (Kathy) Tiedeman. She is also survived by nieces and nephews Sue Oelke (Phil Chojnacki), Greg Tiedeman, Donna (Darryl) Maras, Jennifer (Scott) Mickelsen, Christi (Brian) Kale, Jon Tiedeman, Brianna Oelke, Hailey, Peyton & Rich Maras, Brittany & Brandon Tiedemann, Steven & Matthew Kale, Ella, Jack, & Lily Tiedeman. Funeral Service Monday, December 17th, 2018 at 10am at Our Lady Queen of Peace, 3222 S 29th St, Milwaukee.