"Lord LeClair," Tom interjected smoothly with a smirk, he knew it frustrated the old man when he was forced to use proper titles. He liked to use their given names as if they were friends and to try and endear them to him. But it only disgusted Purebloods and high standing Half-Bloods, it was against social etiquette to call someone by name without permission. Only family and close friends could use given names. If you didn't have express permission, in an informal setting you would use the family name, in a formal setting, you would use their title and family name together. It infuriated many that Dumbledore ignored the etiquette of their world. Unfortunately, his mindless followers had mimicked him in his disregard for everything he claimed was "Pureblood supremacy.’