To me myself, the first Jew is Adam himself.
On another note, I want to say what Scripture teaches about Noah because I myself never fully considered Noah until Ken Ham stated somewhere what Genesis says about Noah:
Genesis 5:28-32 (KJV) And Lamech lived an hundred eighty and two years, and begat a son: And he called his name Noah, saying, This [same] shall comfort us concerning our work and toil of our hands, because of the ground which the LORD hath cursed. And Lamech lived after he begat Noah five hundred ninety and five years, and begat sons and daughters: And all the days of Lamech were seven hundred seventy and seven years: and he died. And Noah was five hundred years old: and Noah begat Shem, Ham, and Japheth.
On another note, I want to say what Scripture teaches about Noah because I myself never fully considered Noah until Ken Ham stated somewhere what Genesis says about Noah:
Genesis 5:28-32 (KJV) And Lamech lived an hundred eighty and two years, and begat a son: And he called his name Noah, saying, This [same] shall comfort us concerning our work and toil of our hands, because of the ground which the LORD hath cursed. And Lamech lived after he begat Noah five hundred ninety and five years, and begat sons and daughters: And all the days of Lamech were seven hundred seventy and seven years: and he died. And Noah was five hundred years old: and Noah begat Shem, Ham, and Japheth.