Robert E. “Bob” Leff, 61 of Arlington Heights was born September 14, 1955 in Chicago to Bernard and Sylvia (nee Katz) Leff and passed away April 4, 2017 surrounded by his loving family. Bob was the beloved husband of Cathryn A. “Katie” Leff; loving father of Jessica M. Leff, Matthew B. Leff and Marissa C. Leff; dear brother of the late Richard E. Leff; cherished brother-in-law of Michael (Lindsay) Campe, Kevin (Rene) Campe and Marie (Shawn) Ferber and fond uncle of Alex, Hailey, Grace, George, Lydia, Rachel and Jeremy. Visitation will be Friday, April 7, 2017 from 3-9 PM at Oehler Funeral Home, 2099 Miner Street (Rt. 14/Northwest Hwy at Rand Road) Des Plaines. Family and friends will gather on Saturday, April 8 at 9:45 AM at St. James Church, 831 N. Arlington Heights Road, Arlington Heights for funeral mass at 10:00 AM. Interment will be private. In lieu of flowers, contributions to the American Cancer Society appreciated.