Where Strong's Concordance defines "proselyte" as follows, the actual definition from the Greek Septuagint is "an Israelite travelling abroad":

G4339

p??s?�??t??

prose�lutos

pros-ah'-loo-tos

From the alternate of G4334; an arriver from a foreign region, that is, (specifically) an acceder (convert) to Judaism ("proselyte"): - proselyte.

 

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Mat 23:15 Woe unto you, scribes and Pharisees, hypocrites! for ye compass sea and land to make one proselyte, and when he is made, ye make him twofold more the child of hell than yourselves.

Act 2:10-11 Phrygia, and Pamphylia, in Egypt, and in the parts of Libya about Cyrene, and strangers of Rome, Jews and proselytes, Cretes and Arabians, we do hear them speak in our tongues the wonderful works of God.

Act 6:5 And the saying pleased the whole multitude: and they chose Stephen, a man full of faith and of the Holy Ghost, and Philip, and Prochorus, and Nicanor, and Timon, and Parmenas, and Nicolas a proselyte of Antioch:

Act 13:43 Now when the congregation was broken up, many of the Jews and religious proselytes followed Paul and Barnabas: who, speaking to them, persuaded them to continue in the grace of God.