Named after the Karl-Bonhoeffer-Nervenklinik, a psychiatric hospital nearby from 1880 to 2006.
The hospital opened as the Irrenanstalt Dalldorf and later took the name of the psychiatrist Karl Bonhoeffer (1868–1948), who worked there as a senior physician in his last years; Berliners called it 'Bonnies Ranch'. His sons Dietrich and Klaus Bonhoeffer were killed by the Nazi regime in April 1945. The S-Bahn station, once called Dalldorf and then Wittenau, took the U-Bahn station's name in 1994.