Probably the most known twins in the Bible are Jacob and Esau. It is obvious to me that they are fraternal twins based on the physical description the Word gives us. But did you know there is another set of twins in the Bible as well. Tamar and Judah had twins. Their twins were Perez and Zerah.
"When the time came for her (Tamar) to give birth, there were twin boys in her womb." Genesis 38:27