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I think the title says it all; I have done a lot of Googling, but I could not find the answer.

Since (I assume) the concept was discovered after Cauchy's death, I speculate that there is a connection between Cauchy horizons and some other (most likely mathematical) notion named after Cauchy (perhaps Cauchy sequences).

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  • $\begingroup$ Presumably because of the notion of a Cauchy surface. $\endgroup$ – Qmechanic Feb 23 at 8:24
  • $\begingroup$ Also Cauchy boundary conditions $\endgroup$ – Subhaneil Lahiri Feb 23 at 9:51
  • $\begingroup$ @Qmechanic That is certainly the case. It just shift the question of why Cauchy surfaces are named after Cauchy though. $\endgroup$ – mmeent Feb 23 at 10:04
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    $\begingroup$ It is the limit/boundary up to which the Cauchy problem has an unique solution. That is why it is a horizon, you can't "see" beyond it, and that's why it is Cauchy, it is about the Cauchy problem. $\endgroup$ – MBN Feb 23 at 12:52

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