Thanks for the info! Did a little digging myself and found at least something interesting about the Merovingians: they were held by folklore to have descended from some kind of sea creature, a mermaid kind of thing (though recent historians have suggested the ancestors were a lot less pretty, and sound more like something out of Lovecraft, especially "The Shadow over Innsmouth").
Clovis is also the name given to the earliest settlers of North America, who came across the land bridge from Siberia during the ice ages and settled as far south as Peru; we mostly know about them from the arrowheads and spear points they left behind, which are sometimes called "Clovis points".
Hey, and here are a couple of easy ones:
Caliban was the crude and lecherous servant of Prospero in "The Tempest", son of Sycorax the witch.
Herod was a tyrranical territorial governor of what is now Israel during the Roman Empire, who made life tricky for Jesus.
Myrdred is, as far as I can tell, merely an adaptation of Mordred, the son of King Arthur by Morgana la Fey who rose up against and finally killed his father.
Hey, does anybody know where "Cu Roi" comes from? Since I'm using him in a level I'd kind of like to know... I'm going to the library today to do some research, so maybe I'll find out.