http://www.themodernantiquarian.com/post/34170

As perpetrator of this particular site I felt like I ought to justify the name (er if I can). I can see what you mean. But I think it's *generally been known as N.T., I don't think I've seen it refered to as Butcombe. Maybe because Butcombe is down in the combe, whereas the barrow is really higher up and Nempnett is higher up too. It is on the parish boundary between the two (Or rather, the parish boundary is on it) but in its smr it is counted as NT. Whatever, the whole area seemed a confusing mesh of roads when I drove through and I didn't get a look at the barrow unfortunately. If you want to add 'Butcombe' as an alternative name, do so, naturally, I can totally see your point.