Th Mann-Whitney test (or the Wilcoxon-Mann-Whitney test)
Woodward-Hoffman Rules - general rules formulating heat vs. light activated sigmatropic rearrangements (fancy chemical reactions)
In Chemistry, a huge number of named reactions have two people associated such as Diels-Alder, Friedel-Krafts, and some of the people aren’t even German!
In biology,
Watson-Crick base pairing of DNA
Luria-Bertani broth (i.e. LB) - a staple of fermentation food for bacteria. Although technically originally named LB for “lysogeny broth” most people refer to it by the inventor and a popularizer’s names.
Michaelis - Menten kinetics. The most common form of enzyme kinetics calculations (catalysis rate) found in biochemistry
Edited to say that in looking at chemical reactions and other responses, MOST sets of name are indeed German.
If this qualifies, we’re going to end up listing every President-VP ticket in history.
Voight-Kampff test.
Is that a typo for Yang–Mills or something else? (And that article cites two more qualifiers: Aharonov–Bohm effect and Kaluza–Klein theory. The first cites two more and 2nd one more. Woo, boy.)
Comet Hale-Bopp
Comet Shoemaker-Levy
Comet Schwassmann–Wachmann
(that is, assuming the ‘etc’ includes things other than theorems etc)
There’s actually nine of those. Everyone just thinks of the ninth one because, well, Jupiter smash.
Sapir-Whorf hypothesis
The Gummel-Poon transistor model: Gummel–Poon model - Wikipedia
Brian