I don't think there's much significance in this, but I hadn't seen it pointed out, so...
There's Pierre, the lawyer that represents Crono in his trial for 'kidnapping' Marle/Princess Nadia in CT.
There's also Pierre, the "swordsman" in CC.
I never saw anything in either game (note - I haven't finished CC yet, but I don't think that really matters too much to the discussion at hand) that could suggest any relation, but I just thought I'd point it out.
*runs away to finish a remix of CC's "phantom ship" track*