Save Gender Feminine Usage Spanish Pronounced Pron. ews-TA-kya [key·IPA] Meaning & HistoryExpand Links Spanish feminine form of Eustachius (see Eustace). Related NamesFamily Tree·Details Masculine FormEustaquioOther Languages & CulturesEustacia, Stacia(English) PopularityDetails Last ranked #411 in 1920 Spain (by decade) Categories feminine forms, food, fruits, goodness, nature, plants, vegetables