Fruitful or productive; steadfast
Derived from the Greek names Eustakhios (meaning 'fruitful') and Eustathios (meaning 'stable' or 'steadfast'). The two names merged in Latin as Eustachius and became popular in medieval Europe due to the legend of Saint Eustace.
Fewer than 5 boys were named Eustace in 2025.
US births per 5-year period, 1990–present (SSA data).
A main character who undergoes a moral transformation · The Chronicles of Narnia
American political writer and biographer
American naturalist and subject of The Last American Man
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