Quassovsky
Quassowski is an East Prussian family name for the following people:
- Arthur Quassowski (1858–1943), German lieutenant general
- Hans Wolfgang Quassowski (1890–1968), Ministerialrat in the Reich Ministry of Economics and well-known genealogist
- Julius Ludwig Quassowski (1824–1909), Royal. Prussia. Railway director, builder
- Jutta Lange-Quassowski (* 1944), German political scientist
- William Quassowski (1876–1942), German district administrator and ministerial director