The man, a professional photographer, had been in a relationship with the 20-year-old woman living in his neighbourhood for the past two-three years, the police said.
The woman's family was against their relationship.
Yesterday, an argument broke out between the two families.
During the argument, the woman's father, mother, uncle and a minor brother caught hold of the man and stabbed him in the neck, the police said.
He was taken to a hospital by his parents where he died.
Police have arrested the woman's father, mother and uncle.