Where does “Panathenaean” come from?

Panathenaean (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.

Panathenaean (English): Of or relating to the Panathenaea

Definitions

  1. Of or relating to the Panathenaea

Ancestry of “Panathenaean”, step by step

Panathenaean 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 Panathenaea

StepLanguageWordMeaning
1EnglishPanathenaeaA festival formerly held annually in Athens to honour the city's patron goddess Athena, involving animal sacrifices, a grand procession, and, every fourth year, athletic and musical contests
2Ancient GreekΠαναθήναιαthe Panathenaea
3Ancient Greekπᾰν-every; all, every
4Ancient Greekπᾶςall, every, each; whole
5Proto-Hellenic*pánts
Every word from Proto-Indo-European óynosEvery word from Proto-Germanic ainazEvery word from Proto-West Germanic ain