I asked my English teacher where the last name Smith came from

"Well," he said, "in the past family names were often descriptive. People who forged iron for a living were called smiths, so that eventually led to the last name Smith."

'Is that where names likes Fisher come from too?' I asked.

"Yes," he replied, "that's exactly where they come from."

'Thank-you,' I gushed, 'you're the best teacher ever Mr. Dickinson!'