King Arthur
From Memory Alpha, the free Star Trek reference
King Arthur Pendragon was a mythic king of England.
At least two Federation starships were named USS Excalibur after the sword that Arthur pulled out of a stone to become king.
In 2372, Kira Nerys and Jadzia Dax were to visit a holosuite program based on King Arthur's court at Camelot. (DS9: "The Muse")
