The Bates Family?

A pompous self made grocer named Bates gets his son into an expensive private school. On day One the whole family is there to see the little blighter begin his first day at school. The grocer, his family in tow, saunters into the principal's office and introduces himself thus: "I am Sir Shortweight Bates. This is my wife, Lady Bates, my daughter Miss Bates and my son Master Bates." "Oh does he?" asks the bemused principal, "we will soon get him out of that terrible habit."