Paying tribute to him at his funeral, Chris Rice, 22, said his brother was a “little hero” whose “heart, courage and love” had made the family fiercely proud.
Jordan, 13, died with his mother Donna moments after telling rescuers to winch his brother Blake, 10, to safety, and then come back for his mother.
He had been determined to be rescued last after a flash flood roared through the town of Toowoomba on Jan 10 and swept away the family car, with Ms Rice and her two sons inside.
But by the time the rescuers returned, the rope holding Ms Rice and Jordan had snapped, dumping them into the raging torrent, where they both drowned.
On Wednesday mother and son were buried in the same grave in matching white coffins during a ceremony in Toowoomba, west of Brisbane