Karnatz is a German surname which is toponymical from a place in eastern Germany, also named Karnatz.
It may refer to:
(1882–1976), German lawyer and church official Bert Karnatz (1905–1932), American racing driver (1921–1977), German politician (born 1981), German art historian Ulrich Karnatz (born 1952), German rower and Olympics competitor
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