Where does “āā” come from?

āā (English) comes from Ancient Greek ἀνά, from Proto-Hellenic *aná — up, upon.

Ancestry of “āā”, step by step

āā traces back through two separate lines of ancestry.

via Ancient Greek ἀνά

StepLanguageWordMeaning
1Ancient Greekἀνάon board; on, upon
2Proto-Hellenic*anáup, upon

via Hawaiian ʻaʻā

StepLanguageWordMeaning
1Hawaiianʻaʻāaa, a type of lava; to burn, glow; to be covered...
2Proto-Polynesiankakaha—
Every word from Proto-Hellenic *aná →Every word from Ancient Greek ἀνά →