Theobald Keyser
mining engineer; Hostages Trial affiant

- Born: 1901-01-01 1901-07-12 (Bochum) (reason for preferred rank: most precise value)
- Died: 1984-12-11
- Country of citizenship: Germany
- Occupation: manager; mining engineer
- Member of: Corps Hasso-Borussia Freiburg
- Participant in: Axis occupation of Serbia; Hostages Trial (date: 1947-10-09; role: affiant)
- Significant person: Kurt von Geitner
- Residence: Bad Dürrheim (date: 1947-10-09)
- VIAF ID: https://viaf.org/viaf/10324955
- WorldCat Identities ID: https://worldcat.org/identities/viaf-10324955