Iona, a fertile little island 1½ m. W. of Mull, where St. Columba landed from Ireland A.D. 563, and built a monastery which was for centuries the centre of ecclesiastical life and missionary enterprise among the Scots of Scotland and Ireland and the Angles of the N. of England. It is 3½ m. long and 1½ broad.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Ion * Ionia