If I understand right, there is theorised to maybe have been one, the jury is still out on whether the tales of vikings reaching america are true and exactly what and where they reached.
Technically Newfoundland is an island, but I would call that North America
But they didn't exclude Icecland! To a geologist, perhaps even parts of Iceland count as North America: https://en.wikipedia.org/wiki/Mid-Atlantic_Ridge#/media/File...
https://www.amazon.com/Myth-Continents-Critique-Metageograph...
For anyone who says this I wonder if they are consistent with how they discuss continents:
- They take care to talk about the Caribbean as something in the waters near North America but not in North America itself
- They talk about Indonesia as something that is in the waters close to Asia and Australia—no need for “Oceania” obviously
- Madagascar as an island next to Africa
And so on and so on.