Andy Nish, M.D., of Gainesville and Susan Nish of Gainesville announce the engagement of their daughter Sarah Elizabeth Nish to Joshua Aaron Addison, son of Marni Addison of Murphy, N.C., and the late Ricky Addison. The bride-elect is the granddaughter of Elaine Conn of Norcross and the late William Conn, and the late William and Margaret Nish. She is a 2009 graduate of North Hall High School in Gainesville.