Theodor
{{Infobox given name
| name = Theodor
| image =
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| pronunciation = {{IPA|de|ˈteːodoːɐ̯|lang}}
| gender = Male
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| origin = Greek
| related names = Theodore, Teodor
| footnotes =
}}
Theodor is a masculine given name. It is a German form of Theodore. It is also a variant of Teodor.
List of people with the given name Theodor
- Theodor Adorno, (1903–1969), German philosopher
- Theodor Aman, Romanian painter
- Theodor Blueger, Latvian professional ice hockey forward for the Pittsburgh Penguins of the National Hockey League (NHL)
- Theodor Burghele, Romanian surgeon, President of the Romanian Academy
- Theodor Busse, German general during World War I and World War II
- Theodor Cazaban, Romanian writer
- Theodor Eicke, German SS general
- Theodor Fischer (fencer), German Olympic épée and foil fencer
- Theodor Fontane, (1819–1898), German writer
- Theodor Geisel, American writer and cartoonist, known by the pseudonym Dr. Seuss
- Theodor W. Hänsch (born 1940), German physicist
- Theodor Herzl, (1860–1904), Austrian-Hungary Jewish journalist and the founder of modern political Zionism
- Theodor Heuss, (1884–1963), German politician and publicist
- Theodor Innitzer, Austrian Catholic cardinal
- Theodor Kittelsen (1857–1914), Norwegian painter and illustrator
- Theodor "Teddy" Kollek (1911–2007), mayor of Jerusalem from 1965 to 1993
- Emil Theodor Kocher, Swiss medical researcher, recipient of the Nobel Prize in Physiology or Medicine
- Theodor Mommsen, (1817–1903), German writer and historian, Nobel Prize in Literature 1902 laureate
- Theodor Paleologu, Romanian politician
- Theodor Pallady, Romanian painter
- Theodor Rosetti, Romanian politician
- Theodor S. Slen (1885–1986), American judge, lawyer, and politician
- Theodor Stolojan, Romanian politician
- Theodor Svedberg, Swedish chemist, Nobel Prize in Chemistry laureate
- Theodor Șerbănescu, Romanian poet
- Theodor Zwinger, Swiss scholar
- Theodor Haraldsson, known by his stage name Theoz, Swedish influencer and singer