Jacob and Esau
Jacob and Esau are the most prominent twins in the Bible. Before their birth, Rebekah felt the children struggling within her. God told her that two nations were in her womb, and that the older son would serve the younger (Genesis 25:21-23).
Esau was born first, and Jacob came out holding his brother's heel (Genesis 25:24-26). Their lives were shaped by rivalry. Esau exchanged his birthright with Jacob for food, and Jacob later received the blessing Isaac had intended to give Esau (Genesis 25:29-33; Genesis 25:34; Genesis 27:27-29).
Still, their story did not end in bitterness. When Jacob returned home after many years away, Esau ran to meet him. The brothers embraced and wept together (Genesis 33:1-4). It is a moving picture of reconciliation after deep family hurt.
And the Lord said unto her, Two nations are in thy womb, and two manner of people shall be separated from thy bowels; and the one people shall be stronger than the other people; and the elder shall serve the younger.
Perez and Zerah
Perez and Zerah were twin sons born to Tamar and Judah. During labour, Zerah's hand appeared first, and the midwife marked it with a scarlet thread. But Perez came out before his brother, an unexpected reversal that gave him a name associated with breaking through (Genesis 38:27-30).
Perez became an ancestor of Boaz and King David (Ruth 4:18-22). Matthew also includes him in the family line of Jesus (Matthew 1:3). Their birth account is brief, yet it becomes part of the larger biblical story leading to Christ.
And it came to pass in the time of her travail, that, behold, twins were in her womb. And it came to pass, when she travailed, that the one put out his hand: and the midwife took and bound upon his hand a scarlet thread, saying, This came out first. And it came to pass, as he drew back his hand, that, behold, his brother came out: and she said, How hast thou broken forth? this breach be upon thee: therefore his name was called Pharez. And afterward came out his brother, that had the scarlet thread upon his hand: and his name was called Zerah.
Thomas, called the Twin
Thomas was one of Jesus' twelve apostles, and John's Gospel calls him Didymus more than once (John 11:16; John 20:24). Didymus is the Greek word for twin. His other name, Thomas, comes from an Aramaic word with the same meaning.
The Bible does not name Thomas's twin or explain whether Didymus was a family description or a nickname. Later traditions offer suggestions, but Scripture doesn't settle it. So the careful answer is simple: Thomas was known as the Twin, but his twin is not identified in the Bible.
But Thomas, one of the twelve, called Didymus, was not with them when Jesus came.
Why their stories stand out
These twins are not just interesting family details. Jacob was later renamed Israel, and his descendants became the twelve tribes of Israel (Genesis 32:28). Perez stands in the line of David and Jesus, showing how God carried his purposes forward through an imperfect and complicated family (Ruth 4:18-22; Matthew 1:3).
Jacob and Esau also remind us that family conflict can leave real wounds, but it need not have the final word. Their reunion is worth reading slowly. For a closer look, begin with Genesis 25, then read Genesis 33 and the family record in Ruth 4.