Magnús Jónsson, Earl of Orkney explained

Magnús Jónsson was Jarl of Orkney (covering the whole of Norðreyjar Which includes not only the Orkney Islands, but the Shetland (Hjaltland) Islands c. post 1300–1321.

Magnús Jónsson
Birth Name:	Magnús Jónsson
Birth Date:	1 January 1291
Birth Place:	Kirkwall, Orkney, Scotland

The Shetland isles were officially transferred to the Scottish from the Norwegians in 1472. Scots soon emigrated there between the 16th and 17th century.^{[1] [2]}

He was a signatory to the Declaration of Arbroath, which describes him as Earl of Caithness and Orkney.

Notes and References

1. Book: Macdougall, Norman. James III: a political study. registration. 19 February 2012 . 1982. J. Donald. 978-0-85976-078-2. 91. What James III had acquired from Earl William in return for this compensation was the comital rights in Orkney and Shetland. He already held a wadset of the royal rights; and to ensure his complete control, he referred the matter to parliament. On 20 February 1472, the three estates approved the annexation of Orkney and Shetland to the crown....
2. Goodacre, S. et al (2005) "Genetic evidence for a family-based Scandinavian settlement of Shetland and Orkney during the Viking periods" Heredity 95, pp. 129–135. nature.com, Retrieved 20 March 2011