Where does “twinling” come from?

twinling (Old Frisian) comes from Old Frisian twine, from Proto-Germanic twinaz, from Proto-Indo-European dwino-, from Proto-Indo-European dwóh₁ — two.

Ancestry of “twinling”, step by step

twinling traces back through two separate lines of ancestry.

via Old Frisian twine

StepLanguageWordMeaning
1Old Frisiantwine—
2Proto-Germanictwinazdouble, two each; twin
3Proto-Indo-Europeandwino-twin
4Proto-Indo-Europeandwóh₁two

via Old Frisian twina

StepLanguageWordMeaning
1Old Frisiantwina—
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwino- →Every word from Proto-Germanic twinaz →