I have a theory that since they have a medieval concept, their names are actually names of monarchs or reference monarchs.
Arthur: King Arthur, the legendary British king
Louis: King Louis, many French monarchs with that name, notably King Louis XIV, Louis the Sun King
Ivan: Popular name of many Tsars in Russia, most famous being King Ivan the Terrible
Mujin: Not the direct name of a monarch, but Temujin, also known as Ghengis Khan, great Khan of the Mongol empire
Dann: again, not a direct name, but the closest monarch being King Dan, one or more of the first rulers of Denmark
Chiwoo: A Korean emperor or a tribal leader and war god in China
Jahan: Shah Jahan, a Mughal emperor
Anyway, stream Excalibur on February 18th, MV teaser here
