His father Alam Ezadyar is the deputy speaker for the upper house of the Afghanistan Parliament.
Afghan riot police clash with demonstrators during a protest in Kabul, Afghanistan June 2, 2017.
Chaudhary pointed out that only Afghan intelligence officials had linked the Haqqanis to Wednesday's blast, and the government of Afghan President Ashraf Ghani was yet to endorse the findings. "We must be strong and united".
It was not clear what caused the three explosions at the funeral, and no group has said it was behind them.
The Taliban denied involvement in the funeral attack, according to a statement.
The chief executive of Afghanistan, Abdullah Abdullah, was at the funeral.
"The attack today, conducted by those opportunistically seeking to use these very fragile moments to destabilise Afghanistan, follows so much violence this week", the United Nations said in a statement.
The deadly blasts continued a surge of violence that has swept through Kabul since a massive truck bombing in the Afghan capital on May 31.
More than 100 were wounded in the attack, which hit the funeral of one of five people killed when police fired on a march against deteriorating security. Abdullah described the attack on TV, Sune Engel Rasmussen of The Guardian said on CNN.
There was no immediate claim of responsibility.
Meanwhile, Gen Murad Ali Murad, the Afghan deputy interior minister, urged demonstrators to disperse because of a high security threat level in the country.
Friday's protest became violent after some of demonstrators continued moving forward after entreaties by police to stop several hundred meters away from the presidential palace, witnesses said.
In a sign of how alarmed Afghanistan's worldwide partners have become at the violence and possible impact on political stability, the United Nations special representative in Afghanistan, Tadamichi Yamamoto, also appealed for restraint.
Isis has been attempting to expand its presence in Afghanistan, claiming a separate bombing on Wednesday in Jalalabad that killed a Taliban member, and has called for increased global terror attacks during Ramadan.
Streets in the center of the Afghan capital Kabul were blocked on Saturday as a demonstration that left several people dead entered a second day.
About 8,000 US troops are now deployed in Afghanistan.