Walter said:Well, there's also the intro to episode 244, where Serpico and Isidro are boasting about how awesome the Hawks were and what a powerful leader Griffith was. Farnese also noticed in episode 175 when Guts uttered Griffith's name, but it's not nearly as direct as the above example.
I half expected Serpico to say "Griffith?!" when Guts said his name to Zodd, but... nope. Anyway you're right in that most of the group is ignorant of Guts relationship to such a significant hero in the Hundred Years' War. Like you said, I have a feeling that might change soon, with some alone time on the boat.
Wow, I really dropped the ball when I said they don't know about Griffith. I had forgotten that episode. They even knew about how the raid leader supposedly caused Griffith's downfall. Maybe there is a chance that a few of them have figured out that Guts was a member of the Hawks, and maybe even be fairly sure that he was the raid leader. They're bound to bring it up eventually, they can't think he's grinding his teeth at Griffith's name for nothing.