Is Jacob the father of Joseph?

Jewish.

Another Answer:

At this point on the timeline of man, Joseph's father, Jacob/Israel was a Hebrew as the grandson of Abram - Abraham:

Genesis 14:13New International Version (NIV)

13 A man who had escaped came and reported this to Abram the Hebrew.

God was in direct communication with Israel and then Joseph. There was no organized religion or Priests. Collectively, the 12 sons and 1 daughter of Israel became known as Israelites.

Eventually, after the death of King Solomon (circa 930 BC) and the dividing the Kingdom of Israel into the Northern Kingdom called Israel and the Southern Kingdom called Judah, the dominant tribe of the Southern Kingdom was the 4th son of Israel, Judah. After this time and during their Babylonian captivity, the people of the Southern Kingdom became known as Jew.