Jan Willem Ter Braak
| Engelbertus Fukken Jan Willem Ter Braak | |
|---|---|
| The body of Braak (1941) | |
| Born | 28 August 1914 | 
| Died | 31 March 1941 (aged 26) Christ's Pieces, Cambridge, England | 
| Cause of death | Suicide by gunshot | 
| Burial place | Great Shelford village Cemetery | 
| Nationality | Dutch | 
| Occupation(s) | Insurance Agent, Journalist | 
| Parent(s) | Willem Briedé and Elizabeth Johanna Fukken | 
| Espionage activity | |
| Allegiance | Germany | 
| Service years | 1940–1941 | 
| Codename | Jan Willem Ter Braak | 
Jan Willem Ter Braak (28 August 1914 – 30/31 March 1941) was a Dutch espionage agent working for Germany who operated for five months in the United Kingdom. Ter Braak, whose original name was Engelbertus Fukken, is believed to have been the German agent who was at large for the longest time in Britain during the Second World War, despite his short period of activity. When he ran out of money, Ter Braak committed suicide in a public air raid shelter.