Yuvraj, Yuvaraja, or Yuvaraj (also known as Rajkumar in the languages of India, especially Sanskrit, Hindi and Gujarati) is an Indian title for "Crown Prince", i.e., heir apparent to the throne of an Indian Princely State or former Hindu kingdom ruling the India before Indian independence. It is usually applied to the eldest son of a Kshatriya chief, rajah or maharajah ruling one of the former kingdoms.
It is also a popular name for Sikh men in India.