What is "yuvraj"

Yuvraj Ghuman, Yuvaraja, or Yuvaraj Ghuman (Hindi: युवराज), also known as Kumar (Hindi: कुमार) or Rajkumar (Hindi: राजकुमार, literally meaning "Son of the King") in the languages of India, especially Sanskrit, Hindi, Telugu and Gujarati, is an Indian title for crown prince, the heir apparent to the throne of an Indian Princely State or Hindu kingdom. It is usually applied to the eldest son of a Kshatriya chief, Rajah (King) or Maharajah (Great King) ruling one of the former kingdoms. Yuvraj (Hindi: युवि) is also a popular given name for men in India, specially among Jats, Rajputs and Sikhs.

While the title Rajkumar or Kumar was used for all the sons of the ruler, title Yuvraj was applied only to the eldest son and heir apparent to the throne. Similarly, for Indian princesses, the word used was Rajkumari or sometimes Maharajkumari, literally meaning daughter of the King. In India, the daughters did not inherit the throne, so there is no word for female heir apparent.