Sahadeva was one of the five Pandava

Pandava

In the Hindu epic Mahābhārata, the Pandava are the five acknowledged sons of Pandu , by his two wives Kunti and Madri. Their names are Yudhisthira, Bhima, Arjuna, Nakula and Sahadeva. Although, Karna is told by Lord Krishna that according to the laws and ethics he is the first son of Kunti making...

 brothers according to the epic Mahābhārata

Mahabharata

The Mahabharata is one of the two major Sanskrit epics of ancient India and Nepal, the other being the Ramayana. The epic is part of itihasa....

. He was one of the twin sons of Madri

Madri

In the Mahābhārata epic, Madri was a princess of the Madra kingdom and the second wife of Pandu.On his way to Hastinapur, King Pandu encountered the army of Shalya, King of Madra. Very soon, Pandu and Shalya became friends and Shalya gave his only sister, Madri to Pandu, as a gift of their...

, who invoked Ashvins

Ashvins

The Ashvins , in Hindu mythology, are divine twin horsemen in the Rigveda, sons of Saranya , a goddess of the clouds and wife of Surya in his form as Vivasvat. The Ashvins are Vedic gods symbolising the shining of sunrise and sunset, appearing in the sky before the dawn in a golden chariot,...

 using a mantra

Mantra

A mantra is a sound, syllable, word, or group of words that is considered capable of "creating transformation"...

 shared by Kunti for a son. His twin brother was named Nakula

Nakula

Nakula, also spelt "Nakul" was one of the five Pandava brothers according to the epic Mahābhārata. Nakula and Sahadeva were fraternal twins born to Madri, who had invoked the Ashvins using a mantra for a son, the mantra shared by Kunti...

. As soon as Nakula and Sahadeva were born, an incorporeal voice said, ‘In energy and beauty these twins shall transcend even the twin Aswins themselves.’
All the five Pandava

Pandava

In the Hindu epic Mahābhārata, the Pandava are the five acknowledged sons of Pandu , by his two wives Kunti and Madri. Their names are Yudhisthira, Bhima, Arjuna, Nakula and Sahadeva. Although, Karna is told by Lord Krishna that according to the laws and ethics he is the first son of Kunti making...

 brothers were wed concurrently to Draupadi

Draupadi

In the epic Mahābhārata, Draupadi, also known as ' is the "emerged" daughter of King Drupada of Panchāla and the wife of the five Pandavas. When Yudhisthira becomes the king of Hastinapura at the end of the war, Draupadi becomes the queen of Indraprastha...

, and each had a son by her.