Many scholars believe that at least Matthew, Mark, and Luke were originally written in Hebrew, but not one of those manuscripts is known to exist. Also, it is possible that the books of Hebrews, Jacob, and Peter could have been written in Hebrew, since they were written to Hebrews, all of whom could read Hebrew, the language of the synagogue. There have been claims that descendants of first century Hebrew New Testament books have recently surfaced, but a copy of Matthew, purporting to be the original, that I have seen contains passages that were added in later centuries, so that cannot be a copy of a first century text. The scholars also say that the Syriac texts, a language close to Aramaic and related to Hebrew, were translated from Greek, not originally written in Syriac or translated from Hebrew. The descendants of the oldest Syriac texts were probably translated from Greek at the end of the second century or the beginning of the third century.