Sigmund Freud | Helmut Jahn | Sigmund Romberg | Sigmund Schenkling | Jahn | Dagobert Sigmund von Wurmser | Friedrich Ludwig Jahn | Sigmund Feist | Sigmund | Sigmund Groven | Sigmund Freud University Vienna | Sigmund Brouwer | Otto Jahn | Jahn Teigen | The Standard Edition of the Complete Psychological Works of Sigmund Freud | Sigmund von Birken | Sigmund Stern Recreation Grove | Sigmund Sternberg | Sigmund Spaeth | Sigmund Neumann | Sigmund Freud's Seduction Theory | Sigmund Eisner | Kolden (back) with ''Sigmund and the Sea Monsters | Johann Jahn | Jahn–Teller effect | Ben Sigmund |
Eberhard Köllner (born 29 September 1939 in Stassfurt, Germany) was selected for Soyuz 31 as the backup for Sigmund Jähn.