Where does “Ternatean” come from?

Ternatean (English) comes from English ternate, from Latin ternus, from Latin ter, from Latin terr, from Old Latin tris, from Proto-Italic trēs, from Proto-Indo-European *tréyes.

Ancestry of “Ternatean”, step by step

Ternatean traces back through two separate lines of ancestry.

via English ternate

StepLanguageWordMeaning
1EnglishternateHaving three divisions
2Latinternustriple, threefold, trinary; three each
3Latinterthrice
4Latinterr
5Old Latintris
6Proto-Italictrēsthree
7Proto-Indo-European*tréyes

via English ean

StepLanguageWordMeaning
1EnglisheanTo bring forth young; to yean
2Middle EnglishenenTo give birth; to yean
3Old Englishēanianto give birth (to lambs)
4Proto-West Germanicgaaunōnto lamb, yean
5Proto-Germanicaunōnąto lamb, yean
6Proto-Indo-Europeanh₂egʷnóslamb
7Proto-Indo-European-nósCreates verbal adjectives from roots
Every word from Proto-Indo-European *tréyes