Where does “Gastonia” come from?

Gastonia (English) comes from English ia.

Ancestry of “Gastonia”, step by step

Gastonia traces back through two separate lines of ancestry.

via English ia

StepLanguageWordMeaning
1Englishia

via English Gaston

StepLanguageWordMeaning
1EnglishGastonA grip using one hand with the thumb down and elbow out
Every word from English ia
Gastonia — Etymology, Origin & Word History | Etymology Explorer