Dad-of-17 Mick Philpott and wife Mairead said they needed "some good" to come from the tragedy after they made the heartbreaking decision to turn off son Duwayne's life support machine on Sunday.
Friend of the family, Father Alan Burbidge told The Sun: "It was a brave and generous decision Mick and Mairead made together in the hope Duwayne's tragic death could bring life to another child."
Mick, 54, and Mairead had kept a vigil at the bedside of Duwayne for three days since Friday's horrific fire.
The alleged arson attack at the family home in Allenton, Derby, also claimed the lives of Jade, ten, John, nine, Jack, seven, Jessie, six, and Jayden, five.
This morning, Mick broke down in tears at a press conference as he described his loss and begged the media to give the family privacy so that they could grieve in peace.
He said he had been "overwhelmed" by the response from well-wishers, both in the community and from abroad.
Police told the press conference that petrol was used to start the fire. The blaze was believed to have originated below the home's letter box.