South Wales Police can confirm that Mark Jones, 43, from Mountain Ash, has died following a shooting in Mountain Ash.
The incident happened just before 7:40pm on Sunday, July 26.
Mr Jones was taken to Prince Charles Hospital before being transferred to Morriston Hospital were he died on Saturday, September 26.
Stephen Bennett, aged 51 from Pontypridd, and Edward Bennett, aged 46, from Mountain Ash have both been charged with attempt murder and possessing of a firearm.
They remain in custody following a hearing at Cardiff Crown Court last month.
Detective Chief Inspector Ceri Hughes said: “Our thoughts are with Mark’s family who are being supported by a family liaison officer at this difficult time.
“A review of charges in relation to the two men in custody will now take place.
“I would ask any members of the community who have any information who have not yet come forward to contact South Wales Police on 101 or Crimestoppers anonymously on 0800 555 111 quoting occurrence number *271720.”