The word "Magus" is the singular form of the word "magi", a Latin word (itself derived from the Persian word "Magus") serving as the root of the English equivalents "mage," "magic," and "magician." Magus' Japanese name Maou translates roughly to "demon king" or "Devil" and is more clearly identified as a title rather than a name.[5] This is reflected in the DS re-release, where he is referred to as "Fiendlord" instead of by name.
The name "Janus" (a Germanic name pronounced with a "Y" instead of a "J") stems from the Roman deity of gateways and beginnings.The Roman deity Janus also inspired the name of the month of January
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