Upvote:6
The answer depends on semantics, but I would say not really, at least not in the strict sense.
This article from Haaretz gives the following as a standard definition shared by relevant experts:
Any Jew who lived for any period of time in a country that was ruled by the Nazis or their allies is called a Holocaust survivor
According to Wikipedia von Mises was Jewish but lived in Austria only until 1934. This means left for Switzerland before the former Austrian Republic was annexed by Nazi Germany in 1938.