James VI of TheHouseOfStuart was king of Scotland. When his disgraced mother [[MaryOfScotland Mary, Queen of Scots]] and her cousin [[TheVirginQueen Elizabeth I]] of England died without issue, he also became king of England. He styled himself King of Great Britain (and devised the Union Jack to fly on his ships and thus emphasise the unity of his realms), though each kingdom still governed themselves.
He is remembered for his great intellect, bad manners and foul temper, and also for commissioning the King James Bible and starting British colonization of North America. He's also kinda gay, probably.
* AmbiguouslyGay: If the court scandal is to be believed.
* HistoricalVillainUpgrade: Most works often play up his bad behavior but not his intelligence.