Where does “twīn” come from?

twīn (Old Frisian) comes from Proto-West Germanic twiʀn, from Proto-Germanic twiznaz, from Proto-Indo-European dwisnós, from Proto-Indo-European dwóh₁ — two.

Ancestry of “twīn”, step by step

StepLanguageWordMeaning
1Proto-West Germanictwiʀntwine, double thread
2Proto-Germanictwiznazthread, twine
3Proto-Indo-Europeandwisnósdouble
4Proto-Indo-Europeandwóh₁two

Words derived from “twīn”

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwisnós →Every word from Proto-Germanic twiznaz →