** Theodor Adorno –

** Theodor Benfey, Geschichte der Sprachwissenschaft ( 1869 )

** Theodor Heuss, 5th President of Germany ( b. 1884 )

** Carl Theodor Dreyer, Danish film director ( b. 1889 )

** West German refugee minister Theodor Oberländer is fired because of his past with Nazi Germany.

** Theodor Innitzer, Cardinal Archbishop of Vienna ( b. 1875 )

** Errors in " The Curse of Xanadu " by Theodor Holm Nelson, Project Xanadu

** Theodor Mundt, novelist and critic

** Medicine-Emil Theodor Kocher

** The Rider on the White Horse, by Theodor Storm

** Trials and Tribulations, by Theodor Fontane

** Medicine-Axel Hugo Theodor Theorell

** Z6 Theodor Riedel ( Type 1934A ) – Korvettenkapitän Gerhardt Böhmig

** Franz Theodor Kugler ( 1808-1858 ), German writer and art historian

** Theodor Bergk, Poetae Lyrici Graeci, iii.

** Karl Theodor Freiherr von und zu Guttenberg ( 1921-1972 ), nephew of above, German politician, German Secretary of State 1967-1969

** Nobel Prize in Physics: Roy J. Glauber, John L. Hall and Theodor W. Hänsch

** 9th Army ( General Smilo Freiherr von Lüttwitz to 20 January ; then General Theodor Busse )

** Theodor Adorno

** Ruth Lessing, American female professional baseball player ( d. 2000 )

** Minna von Barnhelm, by Gotthold Ephraim Lessing

** The Education of the Human Race, by Gotthold Ephraim Lessing

** Yeal, for Violin and Orchestra ( 2005 ), first performed by Kolja Lessing and the Concertino Basel in 2005

** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** If the set A is infinite, then there exists an injection from the natural numbers N to A ( see Dedekind infinite ).

** Every infinite game in which is a Borel subset of Baire space is determined.

** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.

** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.

** The Nielsen – Schreier theorem, that every subgroup of a free group is free.