William David Clancy

William David Clancy, of O’Fallon, MO, passed away Wednesday, November 5, 2025, at the age of 6.

William is survived by his loving parents, Nathan and Lindsay Clancy; his big brother and best friend, Henry Clancy; grandparents, Deborah (David) Garwood and Kevin (Stephanie) Clancy; aunt, Michelle (Dan) Derby; uncles, Nathan Folkemer and Josh (Rachael) Clancy; and many beloved cousins. He was preceded in death by his aunt, Samantha L. Folkemer. William is survived by many extended family members, cousins, neighbors and friends.

William loved swimming, Jiu Jitsu, riding his bike and scooter, rollerblading, and playing Minecraft. He had a special love for penguins and cherished every moment spent playing and laughing with his brother Henry. William brought light and happiness to everyone around him. He was dearly loved and will be greatly missed by all who knew him.