Brynhild (Brynhildr) combines the Old Norse brynja (armor, mail-coat) and hildr (battle) — meaning "armored for battle." In Norse mythology, Brynhild is a Valkyrie cursed by Odin to sleep until awakened by a hero.
Wagner's Ring cycle (1869-1876) immortalizes Brünhilde — perhaps the most famous opera character in German tradition.
Brynhild reduces to six — the number of armored devotion.