Emmett began as a surname connected to the Germanic Emma, itself tied to ideas of wholeness or universality, before settling into use as a given name in its own right. Its meaning leans toward completeness -- someone regarded as sufficient in himself rather than defined by a single quality.
There will many wars and difficulties happen, when in a revolutional figure of the world, Saturn and Jupiter shall be in their exaltations. - William Lilly (1602.-1681.)