The author’s son Winston Graham was quoted as saying “The name Poldark was invented by my father. The point is to license a range of products of a quality and kind to reflect appropriately the TV show and the books. I am personally delighted that business in Cornwall has been boosted by the success of the series and if anyone wants to use the name Poldark to promote their line of business, that is terrific Â provided of course that they take out an appropriate licence.
An opposition application was filed by the estate and the dispute continues.
Poldark trivia here and here