On Wednesday, March 7th, 2018, at the age of 76, of Fort Washington, MD. Beloved husband of Betty Kiernan. Loving father of Thomas Knoch. Brother of James J. Kiernan. Uncle of three nieces and two nephews; great uncle of four nieces. He was proceeded in death by his parents, Mark and Gertrude Kiernan, Sr. and his brother, Vincent Kiernan. In lieu of flowers, memorial contributions can be made in Mark's name to the Humane Society of Prince George's County, 8210 D'Arcy Road, Forestville, MD 20747.