Eysengrein
Eysengrein or Eisengrein is the family name of the following people:
- Balthasar Eysengrein (1547–1611), German lawyer and professor at the University of Tübingen
- Martin Eisengrein (also Eysengreyn, Eisengrin, Isengrin, etc.; 1535–1578), German Catholic theologian and polemicist
- Wilhelm Eisengrein (1543–1584), German Catholic lawyer, historian and controversial theologian