From The Collaborative International Dictionary of English v.0.48:
Yon \Yon\ (y[o^]n), a. [OE. yon, [yogh]on, AS. geon; akin to G. jener, OHG. jen[=e]r, Icel. enn, inn; cf. Goth. jains. [root]188. Cf. Beyond, Yond, Yonder.] At a distance, but within view; yonder. [Poetic] [1913 Webster]
Read thy lot in yon celestial sign. --Milton. [1913 Webster]
Though fast yon shower be fleeting. --Keble. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Yon \Yon\, adv. Yonder. [Obs. or Poetic] [1913 Webster]
But, first and chiefest, with thee bring Him that yon soars on golden wing. --Milton. [1913 Webster]