The Wikipedia page on Holocaust victims (https://en.wikipedia.org/wiki/Holocaust_victims) has a list of the different groups targeted by the nazis.
In addition to what other commenters have written there was also: freemasons, spanish republicans from the 36 revolution, soviet prisoner of wars, slovene and romani.
Interesting to note that nazis killed as much ethnic poles as polish jews.
The Wikipedia page on Holocaust victims (https://en.wikipedia.org/wiki/Holocaust_victims) has a list of the different groups targeted by the nazis. In addition to what other commenters have written there was also: freemasons, spanish republicans from the 36 revolution, soviet prisoner of wars, slovene and romani.
Interesting to note that nazis killed as much ethnic poles as polish jews.