Not very sure the origin of the name of this cocktail – it certainly is not green in color. The one connection I can think of is that the base alcohol is Irish Whiskey and you know St. Pete’s day and all that. Irish Whiskey does not mix very well with just about anything. I had come across the recipe in Serious Eats. I think they did figure out something that can sit with Irish Whiskey – some Sweet Vermouth and a couple of dashes of Orange Bitters.