Does man or Manu have a Greek or Latin root?

Man, as in male person, comes neither from Greek nor Latin, It has a Germanic root.

Manu is more difficult without a context. There is an oceanic Word manu which means bird.

Manu is also a Hindi Word for the first man, and derives from Sanskrit. (The Germanic languages and Sanskrit both derive from Indo-European).

Manu, as short for Manuel is a Spanish/Portuguese name deriving from Latin and late Greek, but of course there are other similar names such as the Hebrew Emmanuel.

The many English Words beginning with manu- such as manual, derive from the Latin manus, meaning hand.