Through his brother Dietrich, he had contacts with the church resistance, and through his brothers-in-law, Justus Delbrück, Dohnanyi and Rüdiger Schleicher, he had many contacts in the military resistance to Hitler, especially in the circle about Wilhelm Canaris in the Abwehr of the Oberkommando der Wehrmacht.
Klaus Kinski | Dietrich Bonhoeffer | Klaus Schulze | Klaus Badelt | Klaus Barbie | Klaus Nomi | Klaus Mertens | Klaus Huber | Klaus Ebner | Václav Klaus | Klaus Ploghaus | Klaus Maria Brandauer | Klaus Knopper | Klaus Fuchs | Vaclav Klaus | Klaus Theweleit | Klaus Schwab | Klaus Biesenbach | Klaus Allofs | Klaus | Karl Friedrich Bonhoeffer | Klaus Zmorek | Klaus Zehelein | Klaus Wowereit | Klaus Roth | Klaus Rifbjerg | Klaus Nordling | Klaus M. Leisinger | Klaus Meine | Klaus Klostermaier |
The psychiatrist Karl Bonhoeffer (1868–1948) was the father of the resistance fighters Klaus and Dietrich Bonhoeffer.