J. Nowak
The taxon authority J. Nowak may refer to:
- Jan Nowak (1880–1940), Polish geologist and paleontologist
- Janusz Stanisław Nowak (1930 –2004, J.Nowak), Polish lichenologist
- Julian Nowak (1865–1946), Polish microbiologist
The taxon authority J. Nowak may refer to: