A Brooklyn cabby was so enraged when his daughter ditched her arranged marriage in Pakistan to be with the man she loved that he had the paramour’s relatives killed, prosecutors charged at the start of his murder-conspiracy trial Monday.

Mohammad Choudhry, 61, ordered his daughter, Amina Ajmal, 24, to marry her cousin, Abrar Ahmed Babar, in Pakistan in 2012 so he could become an American citizen, Brooklyn federal prosecutors said.

But the daughter, a US citizen who attended Brooklyn College, was in love with another man, distant cousin Shujat Abbas, prosecutors said.

Ajmal fled Pakistan in January 2013 and went into hiding in America.

Enraged by the botched union, Choudhry told his daughter in recorded phone calls that he would murder Abbas’ relatives in Pakistan if she refused to come home, prosecutors said.

Four days after the threats, Abbas’ father and sister were fatally gunned down.