Iolo Morganwg, bardic name of Mr. Edward Williams, [372].

Iolo MSS., the, [269], [270], [372], [373], [387], [388], [389].

Iona, Adamnan, Abbot of, [401].

Ioruaidhe, [96], [97], [104].

Ireland, old names of, [125], [126], [150].

See also Iweridd.

Iseult, wife of King Mark, [327], [338].

Island, submarine, [97], [104].

“Island of the Mighty”, a bardic name for Britain, [292].

Islands, sacred, [326].