• Genesis 29:35.
• Genesis 38:1-30 birth of his sons. Tamar.
• Genesis 46:12.
• Genesis 49:8-10. Blessing from his father, Jacob.
• Numbers 26:19-22.
• 1 Chronicles 2:3-55.
• Wikipedia: Judah & יהודה

Fourth son of Jacob and Leah.

The name of the Jewish people, derives from the name of Judah.

-------------------- According to Genesis , Judah married the daughter of the Canaanite Shuah, by whom he had three sons, Er, Onan, and Shelah. Er married Tamar, but died childless. According to custom his widow was given in marriage to his brother Onan, who was slain for misconduct; and she was then promised to the third son, Shelah. This promise not having been fulfilled, she resorted to stratagem, and became by Judah the mother of Pharez and Zarah. Pharez (or "Perez") was ancestor of the royal house of David. Genesis:46,12 And the sons of Judah; Er, and Onan, and Shelah, and Pharez, and Zerah: but Er and Onan died in the land of Canaan. And the sons of Pharez were Hezron and Hamul.

And Tamar his daughter in law bare him Pharez and Zerah. All the sons of Judah were five. Zerah and Perez are the second set of twins (Genesis 38:27-30). Zerah's hand came out of the womb first, and the midwife tied a thread around it, but Zerah pulled his hand back into the womb. Then Perez came out followed by Zerah with the thread still tied around his wrist.

Numbers 26:20 The sons of Judah according to their families were: of Shelah, the family of the Shelanites; of Perez, the family of the Perezites; of Zerah, the family of the Zerahites.