Where does “twane” come from?

twane (North Frisian) comes from Old Frisian twēne, from Proto-West Germanic twai-, from Proto-Germanic twai, from Proto-Indo-European dwóh₁ — two.

Ancestry of “twane”, step by step

StepLanguageWordMeaning
1Old Frisiantwēnetwo
2Proto-West Germanictwai-two
3Proto-Germanictwaitwo
4Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Germanic twai →Every word from Proto-West Germanic twai- →