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https://en.wikipedia.org/wiki/Bryce_DeWitt

In the early-1970s, this change of name so angered Felix Bloch that he blocked DeWitt's appointment to Stanford University and DeWitt and his wife Cecile DeWitt-Morette, a mathematical physicist, accepted faculty positions at the University of Texas at Austin.

https://web.archive.org/web/20190620190641/https://web2.ph.utexas.edu/utphysicshistory/BryceSDeWitt.html

In the fall of 1971, DeWitt accepted a visiting professorship at Stanford. The physics department was looking for a replacement for Leonard Schiff, who had died the year before. Stanford indeed looked promising, not least because the mathematics department expressed an interest in hiring Cécile. The members of the physics department were sufficiently pleased by Bryce’s visit that they made preparations to offer him a professorship. This, however, was vetoed by Felix Bloch, who upon learning that Bryce had changed his surname 20 years earlier, refused to allow the offer to proceed.