Hilda is the Old German short for names containing hild (battle). Saint Hilda of Whitby (614-680) was the Anglo-Saxon abbess of Whitby — patron saint of learning, who presided over the Synod of Whitby in 664.
Hilda Doolittle (H.D., 1886-1961) was the major American modernist poet.
Hilda reduces to nine — the number of Anglo-Saxon abbess.