Dictionary of Medieval Names
from European Sources

Eustacia f. Fem. of Eustace.

England
Latin
1381 Stacia (nom) FenPT-2 p. 11
Early Modern English
1592 Eustice COmar-vol2 p. 24
France
Latin
1179 Eustachie (gen) clairvaux-12thc 169
Cite as: S.L. Uckelman. "Eustacia". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Eustacia.