(nee Piesik) Born to eternal life on Thursday, December 25, 2025, age 88 years. Beloved wife for 64 years to the late Thomas J. Groff Sr. Loving mom of Gerald (Lynn) Groff, T.J (Karrie) Groff and Bonnie (Dave) Yopps. Cherished grandma of Megan (Josh) Nicks, Jessica (Marshall) Stallings and Caroline Groff; Daniel, Diana and Randi (Delaney) Groff; Eric and Ian Yopps. Dear great-grandma of Evann, Ellis and Nolan. Dearest sister of Dan (Mary) Piesik. Fond sister-in-law of Janet (the late Joe) Zupan and the late Shirley (the late Ray) Heebsh. Also survived by other family and friends.

Marelene was a former and proud member of the staff at the St. Francis De Sales Semiary for 20 years. In lieu of flowers, memorials in Marelene's memory to St. Francis De Sales Seminary, 3257 S. Lake Drive, St. Francis, WI 53235 (https://www.sfs.edu/Donate). A sincere thank you to the caring staffs of Trustwell Living Oak Creek Place, Lily Hospice of Brookfield and St. Croix Hospice.

Memorial Visitation at the Funeral Home on Friday, January 9, 2025 from 9:30am-11:15 am. Mass of Christian Burial, 12:00 PM at the Basilica of St. Josaphat, 2333 S. 6th Street. Private inurnment St. Adalbert Cemetery.