vindicator
3 occurrences across the corpus
NT Apocrypha/Pseudepigrapha
And Paul having come to Rome, great fear fell upon the Jews. They came together therefore to him, and exhorted him, saying: Vindicate the faith in which you were born; for it is not right that you, being a Hebrew, and of the Hebrews, should call yourself teacher of Gentiles, and vindicator of the uncircumcised; and, being yourself circumcised, that you should bring to nought the faith of the circumcision. And when you see Peter, contend against his teaching, because he has destroyed all the bulwarks of our law; for he has prevented the keeping of Sabbaths and new moons, and the holidays appointed by the law. And Paul, answering, said to them: That I am a true Jew, by this you can prove; because also you have been able to keep the Sabbath, and to observe the true circumcision; for assuredly on the day of the Sabbath God rested from all His works. We have fathers, and patriarchs, and the law. What, then, does Peter preach in the kingdom of the Gentiles? But if he shall wish to bring in any new teaching, without any tumult, and envy, and trouble, send him word, that we may see, and in your presence I shall convict him. But if his teaching be true, supported by the book and testimony of the Hebrews, it becomes all of us to submit to him.
Nero said: What do you say, Peter? He answered and said: All that Paul has said is true. For when he was a persecutor of the faith of Christ, a voice called him out of heaven, and taught him the truth; for he was not an adversary of our faith from hatred, but from ignorance. For there were before us false Christs, like Simon, false apostles, and false prophets, who, contrary to the sacred writings, set themselves to make void the truth; and against these it was necessary to have in readiness this man, who from his youth up set himself to no other thing than to search out the mysteries of the divine law, by which he might become a vindicator of truth and a persecutor of falsehood. Since, then, his persecution was not on account of hatred, but on account of the vindication of the law, the very truth out of heaven held intercourse with him, saying, I am the truth which you persecute; cease persecuting me. When, therefore, he knew that this was so, leaving off that which he was vindicating, he began to vindicate this way of Christ which he was persecuting.
OT Pseudepigrapha
O mother of the race, vindicator of our Law, defender of our religion, and winner of the prize in the struggle within thyself!