When speaking of whiskey from both sides of the pond, the word "corn' has different meanings. On the west side, "corn" refers specifically to Zea maize, and its gazillion variants. On the east side, and especially in Ireland as relates to this discussion, the word corn is a generic term used much the same as west siders would use the word "grain." However, I don't think it includes maize, but an east-sider could better answer that. Traditionally, Zea maize was not used to make whiskey (or whisky) by the east-side producers, legal or not. This seems to buttress the idea of "The Moonshiner" having an American origin.