| Halfdan Ditlev-Simonsen |
|Born||8 February 1924|
|Died||19 December 1989 (Age 65)|
|Member of||Norwegian Shipowners' Association|
Not to be confused with his son Halfdan Ditlev-Simonsen Jr.
He worked as a ship-owner out of Kristiania from 1914. He was a co-owner of the company Halfdan Ditlev-Simonsen & Co. and a board member of several other ship holding companies, as well as Akers Mekaniske Verksted. He was also a board member of the Norwegian Shipowners' Association from 1928 to 1937 and the Nordisk Defence Club from 1929.
Representing IF Ready, Ditlev-Simonsenwas capped 7 times and scored 3 goals for Norway's national football team between 1912 and 1916. He was also capped in bandy, and for IF Ready he won 13 Norwegian titles in bandy. At one point, the team comprised Halfdan Ditlev-Simonsen and his four brothers John, Olaf Christian, Sverre and Aage. He was president of Norway's Bandy Association from 1920 to 1924 and of the Norwegian Tennis Federation from 1924 to 1926.
- Ottosen, Kristian, ed. (2004). Nordmenn i fangenskap 1940–1945 (in Norwegian) (2nd ed.). Oslo: Universitetsforlaget. p. 168.