Recent work on the Platonic notion of the Guardian has focused on the female Guardian, or “Philosopher Queen,” but mainly insofar as the idea is problematic. Okin, Saxonhouse, and others have tried to be more precise about the concepts involved—this work aims to use actual publications by British and continentally-trained women aristocrats of the sixteenth and seventeenth centuries to fill in the lacunae. It is concluded that these women were not only philosophical thinkers, but in some sense Guardians. Their overview encompassed notions of duty, care, and a concern of the development of the intellectual life that left a mark for future generations.