Christopher Bruce Ahern, 17, of Saint Charles, beloved son of Mike P. Ahern and Sandra Lemar; best friend and big brother of Jack, age 8, Sarah, age 8, William, age 16 and Stephanie age 17; adored grandson of Kathleen Greco, David Rezendes and Sarah Lemar; loving nephew to many and cousin to many. Funeral Mass 10 a.m. Wednesday, St. John Neumann Church, 2900 E. Main St., St. Charles. Burial Queen of Heaven Cemetery, Hillside, IL. Visitation 3 to 9 p.m. Tuesday at the Yurs Fuenral Home, 405 E. Main St., St. Charles. Contributions to the Charity of the donors choice. 630-584-0060. Published in the Chicago Tribune on 8/9/2005.