E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Daughter of Ptolemy, King of Egypt, rescued by St. George from the fangs of the giant, and ultimately married to her deliverer. She is represented as pure in mind, saintly in character, a perfect citizen, daughter, and wife. Her three sons, born at a birth, were named Guy, Alexander, and David. Sabra died from the pricks of a thorny brake.