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Webster 1913 Edition

Noun.

[Written also

pigwidgin

and

pigwiggen

A cant word for anything petty or small. It is used by Drayton as the name of a fairy.

Noun.

[pig and widgeon.] A fairy; a cant word for any thing very small.

pigwidgeon ‎(plural pigwidgeons)

(rare) A small or petty person, creature or object, especially a fairy, dwarf, imp, or elf.
(rare) A contemptible or stupid person or creature.
- 1627, Michael Drayton, Nimphidia, the Court of Faery
  PIGWIGGIN was this Faery Knight, One wondrous gracious in the sight Of fair Queene Mab ...