Moogie is \'Moogle\', but cuter. It just so happened that many years ago, when I first saught after an Internet alias, I was hooked on Final Fantasy games. Thus I was known as Mad Moogle.
About a year later I dropped the \"Mad\" and was just Moogle.
Several years after that, I decided Moogie was more original, and more cute.
My other name, who I used to be known on the forums as Mogura, also has its origins in the word \"Moogle\"- since this, in japanese, derives from the two words for \'mole\' and \'bat\', being \'mogura\' and \'koumori\' respectively.