'alethea' originates from Greek, specifically the word 'ἀλήθεια' (alētheia), where 'ἀ-' meant 'not' and 'λήθη' (lēthē) meant 'forgetfulness'.

'ἀλήθεια' transformed into the English name 'Alethea' during the Renaissance period, maintaining its association with truth.

Initially, it meant 'truth' in Greek, and this meaning has largely remained the same in modern usage.