A Non-Jew "Judaist"?

I wonder what do people who practice Judaism, yet are non-Jews called?

I met one such person recently. Really interesting.

When he explains why he gave up Christianity to embrace Judaism, I can understand where he is coming from. Just a little more extreme and even more fervent than most of us actually.

I miss the Holy Land. The night of a thousand stars. The pink / violet hills. The gentle breeze on the Sea of Galilee.

Even if I never go back again, I will always remember my moments there.