Where does “陽イオン” come from?

陽イオン (Japanese) comes from Japanese イオン, from German ion, from English Ion, from Romanian Ion, from French ion, from English ion, from English anion, from Ancient Greek ἀνιόν — up, upon.

Ancestry of “陽イオン”, step by step

陽イオン traces back through two separate lines of ancestry.

via Japanese イオン

StepLanguageWordMeaning
1Japaneseイオンan ion
2Germanionion (an atom or group of atoms bearing an electrical charge)
3EnglishIonSon of Creusa and Xuthus, and the ancestor of Ionian people
4RomanianIonJohn
5Frenchionion
6EnglishionAn atom or group of atoms bearing an electrical...
7EnglishanionA negatively charged ion
8Ancient Greekἀνιόνgoing up
9Ancient Greekἄνειμιgo up
10Ancient Greekἀνάon board; on, upon
11Proto-Hellenic*anáup, upon

via Japanese

StepLanguageWordMeaning
1JapaneseAlternative spelling of 日: sun, sunshine; yang;...
2Middle Chinese
Every word from Proto-Hellenic *anáEvery word from Ancient Greek ἀνάEvery word from Ancient Greek ἄνειμι