Female Changeling: You've been more fortunate than most Changelings.
Female Changeling: You recognize the term?
Odo: I've been called a "changeling" on occasion.
Female Changeling: A name given to us by the Solids. They meant it as an insult, but in defiance we took it and made it our own.
— Star Trek: Deep Space Nine ("The Search, Part II")
"Let me give you some advice, bastard: never forget what you are. The rest of the world will not. Wear it like armor, and it can never be used to hurt you."
Ronan: (motioning to the downed heroes as he gloats to the helpless masses of Xandar) Behold! Your guardians of the galaxy! What fruit have they wrought?!
(later, when Peter and his True Companions are about to finish off Ronan for good)
Peter: You said it yourself, bitch. We're the Guardians of the Galaxy.
These aren't nicknames, Storm. You've just been rebaptized as a post-human being. It's an idea Magneto and I devised once upon a time: a name which describes your own skills and personality as opposed to those of a long-dead ancestor.
— Charles Xavier, Ultimate X-Men
Announcer: What's your name?
Parker: I told you, I don't...
Announcer: We need a name, a stage name.
Parker: Oh! Uh, uh, The Spider! Is that...?
Announcer: THE AMAZING SPIDER-MAN!
Parker: No! I...
Announcer: LADIES AND GENTLEMEN, THE SPECTACULAR SPIDER-MAN!!
"People who don't like me give me THE BEST names."
— Amanda Jette Knox 
"Yes, Betrayer of Hope. So men have named me, just as they named you the Dragon. When they gave me that name they intended to revile me, but I will yet make them kneel and worship it. What will you do with your name? After this day they will call you the Kinslayer, what will you do with that?"