People associated with undefined
- Siemens, Hermann Werner
- Simmonds, Morris
- Simon, Karl Gustav Theodor
- Simon, Gustav
- Soemmerring, Samuel Thomas
- Sonnenburg, Eduard
- Sorenson, N.
- Soxhlet, Franz Ritter von
- Spatz, Hugo
- Spiegelberg, Otto
- Spielmeyer, Walther
- Spranger, Jürgen W.
- Sprengel, Otto Gerhard Karl
- Spurzheim, Johann Gaspar
- Stacke, Ludwig
- Stargardt, Karl Bruno
- Steddin, Stefan
- Steinbrinck, Walter
- Steiner, Ludwig
- Steiner, Gabriel
- Steinert, Hans Gustav Wilhelm
- Stengel, Christian
- Stenger, Paul
- Stickler, Gunnar B.
- Stieda, Alfred