Duke of Uppland is a title that has been created in the Kingdom of Sweden several times. It is given by the King to one of his sons or grandsons. In earlier centuries duchies in Sweden conferred a ruling position to their prince-duke, sometimes nearly on par with the power held by the king himself; since 1772 dukedoms have been granted in title only. Uppland, meaning "Up land", is one of the provinces of Sweden.
List of Dukes of Uppland
References
Duke of Uppland Wikipedia(Text) CC BY-SA