He married Nancy-Joan Marks, in 1947, and they had three sons and a daughter.
Friendship with Edward Heath Seligman was well known as the oldest friend of the former prime minister
Sir Edward Heath whom he met at
Balliol College,
Oxford, in 1937. Heath was godfather to his eldest son,
Lincoln, and frequently holidayed with Seligman's family. In 1939, in the days before the outbreak of war, he was on a hiking holiday with Heath in Germany and Poland, an especially risky endeavour for Seligman, who was half Jewish. In Warsaw, they were warned by the British embassy to get out of Poland as fast as possible. They avoided being picked up by taking crowded trains and
hitchhiking. While they were in
Leipzig on 26 August, the news of the
Molotov–Ribbentrop Pact was announced and they only just got to France before hostilities broke out. ==References==