Carl Nicolai
Carl Nicolai is the name of the following people:
- Carl Nicolai , pseudonym of the fictional character Gottlieb Theodor Pilz (1789–1856)
- Carl Friedrich Ferdinand Nicolai (1772–1823), German educator
- Carl Heinrich Nicolai (1739–1823), German teacher, theologian, hiking guide and writer
- Carl Heinrich Behrens-Nicolai (1873–1960), German architect, see Heinrich Behrens-Nicolai
- Carl Otto Ehrenfried Nicolai (1810–1849), German composer, see Otto Nicolai