I was the captain on the flight and FYI, I work for an LCC not a legacy. I sure didn’t take my post as getting bent out of shape. It’s more amusing really than anything. Exchange goes like this.

FA says you have a jumpseater. Guy comes in and says, “Hi I am XXXXX with American. I’m riding in the back. I have a seat.”

I ask for his badge, license, medical and JS form. He hands them over. JS form says Envoy. His badge says Envoy. I ask, “Are you AA or Envoy?” Response was “Envoy is wholly owned by American.” I tell him to take his seat and welcome. I feel I was quite nice considering the circumstances. The guy was really condescending with his wholly owned response.