Same here! At some point some version of the story or other called it the Isle of Apples. I think that's also part of its connection to Glastonbury somehow?

(Cheated and googled: ah, right, Giraldus Cambrensis explains that its name comes from the Welsh Ynys Afallach, which means Isle of Apples and is an old name for Glastonbury Tor, in the story about the grave that was dug up there.)

...same here on the Arthurian nerd part too I guess.