What does Hildegard mean?
From Germanic 'hild' (battle) and 'gard' (enclosure, protection), roughly 'protector in battle'. Borne by the 12th-century abbess and polymath Hildegard of Bingen.
What does Zelda mean?
Commonly a short form of Griselda, from Germanic 'gris' (grey) and 'hild' (battle). A separate Yiddish name Zelda meaning roughly 'blessed/happy' also exists, so the battle sense specifically traces to the Griselda line.