Curly Kale is grown a lot up here in Scotland, and some Kales a re used for animal feed,which is what is meant by Cow Kale. Drumhead is a variety of cabbage. Don't know about 'pull early' but there is a variety of Sutherland kale which you just pull leaves off when you need them, and don't harvest the whole plant at once. Could be that.
Dutch is also a cabbage, with a very tight head. It's the sort that you see a lot in supermarkets, like a tight green football.
Pamphrey is an Irish name for a dark green open leafed cabbage, a bit like spring greens.