Born in Baltimore, she was the daughter of the late Dr. Frederick W. and Helen Kircher Spranklin.
She was preceded in death by her husband, Joseph E. Hartnett, Jr.
She is survived by her children, Joseph Johnstone of Salisbury, Lawrence Johnstone and wife, Jane, of Ellicott City, Maryland, Michelle Nilo and her husband, Charles, of Ocean Pines, Kelly Blankenship and her husband, Allen, of Lake Shore, Maryland, and Shannon Angel and her husband, Marti, of Ocean Pines.
There are six grandchildren, Tyler Blankenship, Brittany Nilo, Brooke Blankenship, Caitlyn Nilo, Spencer Blankenship, Savannah Nilo, and one great-grandchild, Taylor Nilo.
Also surviving is her brother, Frederick William “Rick” Spranklin, Jr. and his wife, Carole, of Columbia, Maryland.
She was preceded in death by her sister, Mary Elaine Oaster, in 2010. There are seven nieces and nephews.
Mrs. Johnstone had been a lieutenant in the United States Air Force, serving as a nurse medic. She later worked as a nurse at Mercy Hospital in Baltimore. She had worked as a realtor with Moore, Warfield and Glick.
She had been a member of St. Luke Catholic Church in Ocean City, the Ocean Pines Players Club and the Ocean Pines Tennis Club. She enjoyed reading, collecting lighthouses, sports, including the Ravens and Orioles, and loved animals, especially dogs.
A mass of Christian Burial will be held on Friday, Nov. 3, 2017 at 11 a.m. at St. Luke Catholic Church, 100th St. and Coastal Hwy. in Ocean City. Rev. Paul Jennings will officiate. Interment will be in Gate of Heaven in Dagsboro.
In lieu of flowers, a donation may be made to the Worcester County Humane Society, P.O. Box 48, Berlin, Maryland 21811. Letters of consolation may be sent via: www.burbagefuneralhome.com. Arrangements are in the care of the Burbage Funeral Home in Berlin.