"savior"
The name Sotero is commonly a male name from the "Spanish" origin that means "savior".
Sotero is the Spanish and Portuguese form of the Latin name Soterius, which goes back to the Greek word soter, meaning "savior". The Greek name was borne by Pope Soter, bishop of Rome in the second century, and the name is recorded in Spanish and Portuguese naming use, which fits its appearance in United States birth records from the early twentieth century. It belongs with a small group of names taken from Greek epithets of this kind rather than being a modern creation.
The pronunciation of Sotero is soh-TEH-roh.