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Groiß or Groiss is the family name of the following people:
- Alexander Groiß (* 1998), German soccer player
- Josef Theodor Groiss (also Groiß ; 1933–2019), German geologist
- Veronika Groiss (* 1977), Belarusian opera and concert singer
- Werner Groiß (* 1967), Austrian politician
See also: