 In 1914, he met and married Margrit Huessy whom he loved dearly. They had a son, Hans, and they remained married until her death in 1958. He was then joined by Freya von Moltke, who was to be his companion until his death in 1973. Freya von Moltke was the widow of his former student, Helmuth von Moltke, a key member of the Kreisau circle who was executed by Hitler near the conclusion of World War 2.