Barbara Ann Cosby, better known as Barbie, 65, of Onancock, VA, passed away Thursday, July 16, 2015 at her residence. She was the daughter of the late Col. William L. Cosby, Jr. and the late Marches Pollan Cosby. She was a retired engineer for I.B.M. She is survived by a sister, Martha Lee Cosby of Onancock; a niece, Christine Prettyman and her companion, Bob Murray, of Fairfax Station, VA; two nephews, C.J. Prettyman IV of Onancock, Lee Cosby Prettyman of Nassawadox, VA; two great nieces, Amanda Jade Reyna of Fairfax Station, Ashley Renee Prettyman of Phoenix, AZ and two great nephews, Dakota Alexis Reyna of Fairfax Station and Kevin Prettyman of Silver Beach, VA. To honor her wishes no public service will be held. In lieu of flowers, memorials may be made to Hospice and Palliative Care of the Eastern Shore, 165 Market Street, Suite #3, Onancock, VA 23417. The family would like to extend a special thanks to Dr. Albert John Halls of Onley, VA. Online condolences may be sent to the family at www.doughtyfuneralhome.com Arrangements were made by Doughty Funeral Home in Exmore, Virginia.