《冰與火之歌》之中，Maggy的外號為什麼是「Maggy the frog」？

為了證明這個不是不宜公開討論的內容，我複製一下英文的冰火wiki好了。我僅僅指冰與火之歌，劇集黨請勿回答（因為劇集里沒有這個角色），謝謝。
Maggy, better known as "Maggy the Frog", was a fortune teller from Lannisport. Her true name has been forgotten, while "Maggy" was likely a bastardization of the word "Maegi"

不好意思這道題我答錯地方了，應該是回答（什麼時候你會感慨「這也能開車」 ）的問題。