I think you are mis-remembering. In my copy, he's just called "Pilot Officer Mayhew", no first name. It's unsurprising that Cordelia wouldn't bring it up, as she wouldn't have seen him for ~35 years, and probably doesn't even remember him that well. I expect (if it is the same person) that Arde remembers *her* pretty well, as he probably got in a fair amount of hot water for helping her. Perhaps a bit embarassing to bring up decades later (in Winterfair Gifts), though. On the other hand, bringing the connection on-stage in TWA would have been unnecessary, potentially confusing, and have highlighted a Big Coincidence, which the rather overloaded plot did not need another of.