Rune

Runes  were the characters in the various alphabets that were used by the Vikings during the Middle Ages. Although later permutations of the runic alphabet comprised up to sixteen characters, the one used in the 9th century had a smaller set of letters. (TV: The Curse of Fenric)

The Arthurian wizard Ganeida's dress was embroidered with runes and sigils. (PROSE: A Honeycomb of Souls)