Eustathios is the Ancient Greek form of Eustathius. Derived from the Greek word εὐσταθής (eustathes) meaning "well-built, stable," it combines the elements eu ("good") and histemi ("to stand, to set up"). The name thus conveys a sense of firmness, reliability, and prosperity. Historical and Religious Context Eustathios was borne by several early Christian saints. The most notable is the 2nd-century martyr Eustathius, also known as Eustachius, who converted after a vision of Christ between antlers while hunting—a legend later popularized as Saint Eustace. Other saints include Eustathius of Antioch, a 4th-century patriarch, and Eustathius of Thessalonica, a 12th-century scholar and archbishop who wrote commentaries on Homer. The name is venerated in Eastern Orthodox and Catholic traditions. Usage and Variants In modern Greek, Eustathios (Ευστάθιος) has been shortened to Efstathios, with common diminutives like Stathis. Across Europe, the name has evolved into various forms: Eustace in English, Eustache in French, and Ostap in Ukrainian, among others. The name remains relatively rare in English-speaking countries but continues to be used in Greece and parts of Eastern Europe. Key Facts Meaning: "Well-built, stable" Origin: Greek eustathes from eu (good) + histemi (to stand) Type: Given name Usage: Ancient Greek, Eastern Orthodox Christian areas