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29 But [alla] he is a Jew [Ioudaios], which is one inwardly [en][kruptos]; and [kai] circumcision [peritome] is
that of the heart [kardia], in [en] the spirit [pneuma], and
not [ou] in the letter [gramma]; whose [hos] praise [epainos] is not [ou] of [ek] men [anthropos], but [alla] of [ek] God [theos]. KJV-Interlinear
29 But a
Jew is one inwardly, and circumcision is a matter of the heart, by the Spirit,
not by the letter. His praise is not from man but from God. ESV
Answers To Study Question(s)
Answer:
The Jew is the person, any person, who has believed in Christ. Physical birth is not relevant.