Two Headed Snakes

- In 1811, Chang and Eng Bunker were born in Siam and exhibited around the world starting in 1829, but later settled down in the American South and led the life of plantation owners. Both died in 1874. Because of Chang and Eng, the phrase "Siamese Twins" became synonymous with conjoined twins.
- In 1990, Abigail and Brittany Hensel were born in Minnesota, United States
- In 2000, Ayse and Sema Tanrikulu were born in Kahramanmaraş, Turkey
- In 2003, June 13, twin girls named Huda and Manal Abdel Nasser Mohammed Mahmoud, were delivered by Caesarean section in a hospital in Asyut, Egypt