No, Doallyn is still Doallyn. It is the unnamed skiff guard, that people mistook for Doallyn, that has been named Brock Starsher.
If they had been the same person the short story that originally named Doallyn would have had to have been completely thrown out, since in it he didn't leave the palace and survived. Pretty hard to retcon that with being gutted and falling into the Sarlacc as the same person.