Where does “Pangean” come from?

Pangean (English) comes from English ān, from Middle English ān, from Old English ān, from Proto-West Germanic ain, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Ancestry of “Pangean”, step by step

Pangean traces back through two separate lines of ancestry.

via English ān

StepLanguageWordMeaning
1Englishān—
2Middle Englishāna, an indefinite article
3Old Englishānlonely; entirely alone, solitary, single; one
4Proto-West Germanicainone
5Proto-Germanicainazone; some
6Proto-Indo-Europeanóynosone; single

via English Pangea

StepLanguageWordMeaning
1EnglishPangea—
2GermanPangäa—
3Ancient Greekπᾰν-every; all, every
4Ancient Greekπᾶςall, every, each; whole
5Proto-Hellenic*pánts—
Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Proto-West Germanic ain →