RhymeZone: yoon definitions

Definitions of Yoon:

name: A surname (rare: 1 in 33333 families; popularity rank in the U.S.: #4164)

noun: A surname from Korean.
noun: (Scotland, informal) A re-spelt abbreviation of unionist, often used by advocates of Scottish independence.
noun: Alternative spelling of Yoon [A surname from Korean.]

(Definitions from Wiktionary)