Let's say you traveled back in time prior to the Bard being a class. Let's say you gave gamers the list of class features for the Bard with the name scratched out and asked them to name it. They would come up with Troubadour, Ministrel, Scald, whatever. People would understand the archtype/concept even if they didn't know what it was named. This would not happen with the Samurai. The name, and the concept invoked by it, have no relation to what the class is. It's the Spooky Warrior of Dual-Wielding, not a Samurai.