In
Αἰγέα and
Ἐρεχθέα [1] and all similar [names] they lengthen the final 'a'.
Aristophanes in
Banqueters [writes]: "Summon for me Erechtheus and Aigeus."[2]
Aigea kai Erechthea kai pantôn tôn toioutôn ekteinousi to teleutaion a. Aristophanês Daitaleusi: ton Erechthea moi kai ton Aigea kalei.