The 19-year-old youth, Narendra, died last night while the 17-year-old girl is still in a critical condition after consuming poison yesterday, police said.
The father of the girl had registered a complaint on November 27 against the youth, accusing him of abducting his daughter, police said.
Their location was traced in Ajmer and yesterday the runaway lovers were being escorted back by the police and the family members of the girl.
The couple consumed poison as the party stopped at a restaurant near Nawalgarh on their way, police said.