How many sets of twins found in Bible history?

There are two set's of twins mentioned in The Bible and I'm sure this has been answered before. We have Esau and Jacob, and Tamar's twins Zeresh and Pharez. However, there is sketchy talk of Thomas (a disciple of Jesus) being a twin for the meaning of his name. there is also talk of Joseph's sons being twins but i doubt it for scripture would have said so.