RhymeZone: peggy definitions

Definitions of Peggy:

name: A female given name (common: 1 in 480 females; popularity rank in the U.S.: #101)

noun: A diminutive of the female given name Margaret, also used as a formal given name.
noun: (cryptography) Placeholder name for the party that supplies a proof.
noun: Any of several small warblers, the whitethroat, etc.
noun: (UK, naval slang) The petty officers' mess steward.

(Definitions from Wiktionary)