Protectress

But consider, whether in the sacred promise to be not only a protectress, but a mother to this poor child, your purpose may meet the wishes of the noble knight your husband.

Source: wiktionary

She left a daughter, who was adopted by Lady Evelyn, to share a like fate with her mother; for when I saw Lucy Aylmer, her protectress was dead, and she had returned to her father's house, with a pale cheek and languid step, which showed how little her heart was there.

Source: wiktionary

Her protectress, at this, was upon her again [...]. For the rest of the conversation she was enclosed in Mrs. Wix's arms [...].

Source: wiktionary

In Titian’s hands, Diana, protectress of pubescent girls, became a sporty archer in tie-up sandals and bracelets, hair gathered in a loose bun, a silky tunic gaping to reveal one breast, shooting an arrow at her hunky voyeur, who has newly furry ears and a shiny nose, dogs nipping at his crotch.

Source: wiktionary