The Greek word σωτήρ (sōtēr) and the feminine σωτείρα (sōteira) were in widespread use centuries before Christianity.
Some examples (earliest date, and onwards):
From a Hellenic lens, Jesus belongs inside an already ancient Mediterranean category of savior figures: healers, revealers, guides, and rescuers of the soul.
The Greek title Σωτήρ (Sōtēr) did not begin with Christianity. It already belonged to gods, healers, kings, and benefactors who preserved life, restored health, rescued cities, or delivered people from danger. Jesus enters that older vocabulary as a new savior figure, not as the invention of the category.
The Acts of Bartholomew makes this especially clear. In chapter 5, Jesus explains the meanings of his own names:
“The Father called me Christ, so that I might come down upon the earth and apply the oil of life to every human being. He called me Jesus, so that I might heal every sin of those who are ignorant.”
The text explicitly connects Χριστός (Christos) with χρίω (chriō), “to apply, smear, anoint, rub with oil or salve.” In this passage, Christos is not treated as a vague religious label. It is the "one who applies the salve".
The same passage connects Ἰησοῦς (Iēsous) with ἰάομαι (iaomai), “to heal, cure, treat, restore.” Jesus is therefore presented as a healer by name (Jesus) and a salve-applier by title (Christ - or what we think of as his last name).
This fits the wider Hellenic pattern. A savior is one who heals, preserves, restores, rescues, or initiates. Jesus heals bodies, opens eyes, casts out destructive powers, reveals hidden truths, and guides souls toward Theos, divine light, and the divine messengers (αγγελλος/angels) from Ouranos (the sky vault, the kosmic ascended state, or what we might later call heaven).
In this sense, Jesus is a Sōtēr because he performs the ancient work of the savior: he heals, applies the life-giving medicine, reveals divine knowledge, and leads the soul out of ignorance toward illumination.
The Christian claim was not that no saviors existed before Jesus. The Greek world already had many. The Christian claim was that Jesus became their central savior. From a Hellenic perspective, he stands in continuity with a much older tradition of healing saviors, divine physicians, pharmakon-workers, and revealers of light.