Merriam-Webster's Collegiate® Dictionary, 11th Edition
YON
I. adjective
Etymology: Middle English, from Old English geon; akin to Old High German ienēr, adjective , that, Greek enē day after tomorrow Date: before 12th century yonder ,
II. pro noun
Date: 14th century
that or those yonder,
III. adverb
Date: 14th century
yonder , thither