Jonak
Jonak is the family name of the following people:
- Eberhard Jonák (1820–1879), lawyer and statistician
- Gustav Jonak (1903–1985), SS-Obersturmbannführer, head of the department for protectorate matters at the Reich Security Main Office, government director in the Baden-Württemberg Ministry of the Interior
- Hans Jonak von Freyenwald (1878–1953), anti-Semitic publicist
- Tanja Jonak (* 1970), German pop singer
- Ulf Jonak (* 1940), architect
- Zdeněk Jonák (1917–1995), composer