I think the name Danish oil probably derives from the use of this type finish by the Danish furniture industry. They produce a lot of nice quality furniture there and the ‘natural’ look most of their products have has been popular for many years and continues to be so even today. I think they realized early on that they needed a more durable finish than just oil imparts and I suppose that is why they settled on the oil/poly, linseed oil or tung oil/spirit combo.
Mike, an American living in Norway