Where does “Castelló” come from?

Castelló (Catalan) comes from Catalan o, from Latin aut, from Proto-Italic *auti, from Proto-Indo-European h₂ewti, from Proto-Indo-European h₂ew, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

Ancestry of “Castelló”, step by step

Castelló traces back through two separate lines of ancestry.

via Catalan o

StepLanguageWordMeaning
1CatalanoThe Latin letter O; or
2Latinautor
3Proto-Italic*autieither, or
4Proto-Indo-Europeanh₂ewtion the other hand
5Proto-Indo-Europeanh₂ewaway from, off; again
6Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact

via Catalan castell

StepLanguageWordMeaning
1Catalancastellcastle; château; castell
2Latincastellumcastle, fort, citadel, fortress, stronghold; a...
3Latincastrumcastle, fort, fortress; camp, especially a...
4Proto-Italickastromknife
5Proto-Indo-Europeanḱos-tróm
6Proto-Indo-Europeanḱes-to cut off, separate; to cut up, to slaughter; to...
Every word from Proto-Indo-European ǵʰeEvery word from Proto-Indo-European h₂ewEvery word from Proto-Indo-European h₂ewti
Castelló — Etymology, Origin & Word History | Etymology Explorer