This phenomenon exists in the German language as well. The "Schwarzschild" in Schwarzschild radius literally means "black shield", but it is in fact named after

This phenomenon exists in the German language as well. The "Schwarzschild" in Schwarzschild radius literally means "black shield", but it is in fact named after Karl Schwarzschild. On the other hand, there are terms like eigenvector/eigenvalue, which literally mean "own"-vector/"own"-value in German. When I first learned that they still have the "eigen" prefix when translated to English, I immediately assumed that they are named after some mathematician named Eigen. To my surprise, that was not the case -- for some reason, mathematicians did indeed decide to use the German word for "own" as a prefix.