The word Jews stems from the tribe of Judah.

The Hebrew Nation had 12 tribes.(Also known as the Israelite's)

Israel (Israel is also Jacob) the Nation now is mainly Jews/Tribe of Judah and some Benjamites/ Tribe of Benjamin
and some Levites/ Tribe of Levi.

The remaining tribes are called the lost tribes of Israel.

Hebraic traditions are popping up all over nowadays.