"According to Namboodiri Brahmins themselves, they are the original Vedic Brahmins of Kerala. However there is no historical record to support this claim. Marxist historians claim that Namboodiri Brahmins arrived in Kerala only in the sixth century. If this is true, then we may speculate that the Namboodiri Brahmin community were originally Syrian Christian immigrants who converted to Vedic Hinduism. The claim that St. Thomas converted four Namboodiri families to Christianity was invented by Syrian Christians to give themselves caste status. It is doubtful if Judus Thomas would have called himself a Christian; he was a practicing Jew who would neither build churches nor carve crosses (the latter being abhorrent to his cultural sensibilities and not used as a Christian identity symbol until after the third century). The designation "Christian" was first used for St. Paul's converts in Antioch after 45 CE."