Charles IX of Sweden
It is often, and erroneously, referenced that king Charles IX of Sweden would have called himself as the "King of the Kvens". The king expanded his already lengthy title 1607 CE to be as follows (example from year 1608 CE):
"Carl then Nijonde medh Gudz nådhe, Swerikes, Göthes, Wendes, Finnars, Carelers, Lappers j Nordlanden, the Caijaners, och Esters j Lifland, etc. Konung"
The title does not include Kvens, but "Caijaners", Swedish name for inhabitants of Kainuu. His son dropped the "Lappers j Nordlanden, the Caijaners" from the title 1611 CE when he succeeded his father as king, and the text was not added to it later. The fix in the Charles IX's title is clearly related to the construction of the Kajaani castle 1604 CE close to the Russian border.
Read more about this topic: King Of Kvenland