Jannayak Janta Party (JJP) leader Chautala also met the governor and gave his party's letter of support to him.
Gopal Kanda continues to face trial in the airhostess suicide case, which is now in the evidence stage in a trial court.
Kanda's rise is well known in his hometown Sirsa, where he began as a shoe shop owner. He later joined the realty business and then dabbled with the aviation sector.
Independent legislators Dharampal Gondan, Nayanpal Rawat, Sombir Sangwan, Rakesh Daulatabad and Randheer Golan -- met Nadda and extended their support to the saffron party.
The BJP was either winning or leading in 40 seats in the elections to the 90-member state assembly, according to the latest election commission figures, falling short of the majority mark of 46.
Addressing a poll rally in Kharkhoda here on Sunday, Khattar launched a fierce attack on the Congress and the Jannayak Janta Party, asking the voters to show the door to these "family-based parties.
Singh stated that he will be consulting party workers and then determine the next course of action.
Welcoming the new leaders, at a programme held in Tilyar here, the Chief Minister Manohar Lal Khattar urged them to immediately join campaigning for the ruling party.
The state Congress chief said the loan waiver promise would be part of the manifesto for the October 21 Haryana assembly polls and the document would be unveiled soon.
AAP had not contested the assembly polls in 2014, in which the BJP came to power for the first time in Haryana.