The English and Irish surname Eustace is derived from from the personal name Eustace (Latin Eustacius, from Greek Eustakhyos, meaning ‘fruitful’). The name was borne by various minor saints, but little is known of the most famous St. Eustace, patron saint of hunters, said to have been converted by the vision of a crucifix between the antlers of a hunted stag. In Ireland the family are one of the great Anglo Norman families from the 12th Century and are mainly found in Dublin and Wexford.The first written reference is that of Richard Eustase. This was dated 1275, in the Subsidy Tax Rolls of Worcestershire. Margery Eustace in the records of the Earldom of Cornwall in 1296, and Robert Eustace in the Register of Oxford University, dated 1513.