Yuyutsu (Sanskrit: युयुत्सु) in the Hindu epic Mahabharata was a son of Dhritarashtra with Sughada/Sauvali, his wife Gandhari's maid. He was the paternal half-sibling to Gandhari's children: Duryodhana and the rest of the 99 Kaurawa brothers and their sister Dushala. Eventually, he was the only son of Dhritarashtra who survived the Kurukshetra war.
The word yuyutsu is an adjective formed from the desiderative stem of the verb root "yudh" (fight, wage war), meaning "wishing to fight, bellicose." The Mahabharata cites the following other names for Yuyutsu- 
- Dhārtarāstra (धार्तराष्ट्र) - son of Dhritarashtra
- Kauravya (कौरव्य) - descendant of Kuru
- Vaishyaputra (वैश्यपुत्र) - son of a Vaishya woman
Fearing problems with Gandhari's pregnancy which had continued for almost two years, Dhritrashtra had a child from Sughada, a woman from Vaishya Varna, who is lady in waiting to Gandhari. Yuyutsu was born at the same time as Duryodhana and Bhima and was elder to Dushasana, other Kauravas and Dussala. Thus, Dhritarashtra had 102 children.
Righteous in the Kaurava camp
Yuyutsu is celebrated as a moral warrior who chose the path of righteousness, in spite of being born in circumstances that predisposed him to evil. He forwent his family bonds in order to side with dharma.
Also, Yuyutsu saved the life of Bhima by informing the Pandavas about Duryodhana's cunning schemes, which included poisoning water.Both Yuyutsu and Vikarna abhorred Duryodhan's conspiracies and evil schemes; however, Vikarna stays loyal to the family and perishes in the war.
During Kurukshetra War
Before the onset of the battle of Kurukshetra War between Kauravas and Pandavas, Yuyutsu shifts from Kauravas to the Pandava camp. Yuyutsu fought the battle on the side of the Pandavas. He was one among the 11 Maharathis (capable of fighting 720,000 warriors simultaneously) among the Kauravas. Yuyutsu was one among the eleven warriors to have survived the war.
After the War
When the Pandavas decided to retire from the world at the start of the Kali Yuga and departure of Krishna, Yudhishthira gave the charge of supervising the kingdom to Yuyutsu while Parikshit was made the king
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