In 1938, Eng married Baroness Wanda Gyllenstierna (born 1917), the daughter of Baron Eric Gyllenstierna and Wanda Henriksson.[4] They divorced and he married Annelise Pedersen (born 1916), the daughter of Aage Pedersen and Anna Lottenburger. He was the father of Peter (born 1946), Camilla (born 1948) and Monica (born 1950).[2]