Since Admiral Ackbar fought alongside Anakin Skywalker during the Clone Wars (e.g. shown in Star Wars the Clone Wars season 4, episode 1) why didn't he recognize Luke Skywalker's name in Return of the Jedi (or before if they met)? Did he just keep it to himself or did he figure out that Luke was Anakin's son?
In the original trilogy, they didn't meet before Return of the Jedi. And they don't even meet actually. Luke joins the party when all plans were explained and everybody was preparing for the battle. So, even if he saw him, he couldn't know his name. Leia, Han, Chewbacca and Luke leave right after this meeting.