Where does “Cassiopeian” come from?

Cassiopeian (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.

Cassiopeian (English): Of or relating to the constellation Cassiopeia

Definitions

  1. Of or relating to the constellation Cassiopeia

Ancestry of “Cassiopeian”, step by step

Cassiopeian 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 Cassiopeia

StepLanguageWordMeaning
1EnglishCassiopeiaProud wife of Cepheus and mother of Andromeda, queen of Ethiopia. When she boasted that her beauty was equal to that of the Nereids, she was punished by Poseidon
2LatinCassiopēiaCassiopeia the proud wife of Ethiopian king Cepheus and mother of Andromeda
3Ancient GreekΚασσιόπεια
Every word from Proto-Indo-European óynosEvery word from Proto-Germanic ainazEvery word from Proto-West Germanic ain