Judah was the fourth son of Jacob and Leah, and one of the twelve sons of Jacob, his name in Hebrew is Yehudah, meaning praise. Judah is one of the more significant figures in the Bible. The important tribe of Judah is named after the patriarch Judah, since King David, and ultimately Jesus the Messiah, came from this tribe.

In the well-known study relating to the selling of Joseph into slavery because of the anger of the brothers against Joseph and their decision to kill him. Judah intercedes and convinces them to sell Joseph to some traders who were passing through, which enabled him to become a leader in Egypt.

In addition to this event regarding Joseph, Judah is also known because of his involvement regarding Tamar. According to custom, when a man died, the woman was to be married to a brother of the brother who died (later known as the levirate law). After two of Judah's sons died, it was custom for the third son then to marry Tamar and bear a child for the deceased son. Tamar attempted to avoid this custom and dressed as a prostitute and tricked Judah to have sex with her, which resulted in her giving birth to two sons, Perez and Zerah, which then continued the line of Judah, from which the Messiah came.

The fourth son of Jacob and Leah was Judah. Afterward, his name was used for the tribe of Israel, which  became the prominent tribe of the Jewish people. Judah, through Shuah, was the father of Er, Onan, and Shelah. The oldest of these sons married Tamar (married to several sons of Judah). Two of his sons (Er and Onan) married Tamar (consistent with Israel's levirate law), and each died. Judah, then, refused to allow Tamar to marry his remaining son. After this Tamar disguised herself as a prostitute and Judah had sexual relations with her, and through Tamar became the father of Perez and Zerah. Later Judah was instrumental in preserving the life of his youngest brother Joseph, when the other brothers, being jealous of Joseph, plotted to kill him. He offered the alternative of selling Joseph to men on the way to Egypt. When Jacob was dying, he gave Judah a special blessing that his tribe would be over the other tribes of Israel (see Gen 29:35; 35:23; 37:26, 27; 38:1-30; 43:3-10; 44:14-34; 46:12, 28; 49:8-12; Exod 1:2; Num 1:7, 26, 27; 26:19-22; 1 Chr 2:1, 3, 4; 4:1; Matt 1:2; Luke 3:33; Heb 7:14).