So I made Eletha as an Au Ra on FF14.
To keep up with the lore her original name was Miharu. After fleeing home and her family being killed on the way she was taken in by an Elezen. As Miharu temporarily wouldnt speak because of the trauma the elf named her Elethelle.
Eventually Elethelle spoke and the elezen adopted her, which meant she took on her last name Meriel.
Noting her name was Elethelle Meriel and too pretty and dumbly musical and rhymed she called herself Eletha. (Because Elethe confused people, either saying El-leh-thur or El-leth.)