Leonard "Oney" Wittlieff passed away peacefully on Friday, August 15, 2025 in Traverse City, Michigan at 94 years of age. Leonard was born on September 25, 1930 in Manistee, Michigan to John and Veronica (Gorecki) Wittlieff. On September 3, 1955, he married Clarice Glocheski at St. Joseph's Catholic Church. Clarice preceded Leonard in death on August 24, 2021.

Leonard served in the United States Army during the Korean War from March 1951 to April 1957. He worked his last 17 years for Morton Salt in Manistee as a Pan House operator. His passion was fishing for steelhead and walleye, going to deer camp, and listening to the stories of all the young hunters. He especially enjoyed the Upper Peninsula for fishing on Little Bay and Big Bay de Noc, as well as his many hunting trips out west.

Leonard is survived by his three sons: Leonard (Gerri) Wittlieff of Muskegon, Michigan, Wayne Wittlieff of Manistee, Michigan and John (Rachel) Wittlieff of Manistee, Michigan. Three grandchildren: Kristin Brunnegraf of Ohio, Colin Wittlieff of Benzonia, and Claire Wittlieff of Manistee. He is also survived by a special nephew, Paul Paprocki, of Cooks, Michigan, who he mentored in hunting and fishing, and enjoyed spending time with.

Leonard was preceded in death by three brothers: Claude (Lou) Wittlieff, Clem (Charmaine) Wittlieff, and Phillip (Mary Ann) Wittlieff, and two sisters: Genevieve (Roy) Ross and his twin sister, Leona (Carl) Marzinsski.

Mass of Christian Burial will be celebrated on Friday, September 5, 2025 at 11:00 a.m. at St. Joseph's Catholic Church in Manistee, Michigan, with Reverend James Bearss celebrant. Burial will follow at Mount Carmel Cemetery in Manistee, where the members of the Manistee County United Veterans Council Ritual Squad will give final Military Honors. The family will receive visitors at the church on Friday morning, one hour prior to the mass.

In lieu of flowers, per Leonard's wishes, those wishing to remember him are asked to make a donation in his name to the St. Jude's Children's Hospital. Envelopes will be available at the church on Friday morning. The Herbert Funeral Home of Manistee is in charge of funeral arrangements.