It is not so cut and dry, as some were pirates, some Vikings, some had Viking ancestry, and several more were all of the above. A few famous Scottish pirates include, starting with the most famous, Captain William Kidd, Sir Andrew Barton, and Alexander Dalzeel. Vikings conquered and/or settled in the areas in and around what is modern Scotland, Ireland, and England, particularly the islands such as the Hebrides. And then there were Viking/Scottish pirates, such as Thorbjorn Thorsteinssen. Of course, Vikings were essentially pirates to begin with.