Different parts of the UK had different names for left-handed people. It predates baseball or rounders. I can't remember which, but one region used the term 'so

Different parts of the UK had different names for left-handed people. It predates baseball or rounders. I can't remember which, but one region used the term 'southpaw'. I've seen a map explaining this but I can't find it at the moment. Its a weird feeling when I completely can't find something via Google, even though I've seen it online.