Derived from old english, meaning "Pear Tree" or some jazz like that. People will inevitably spell this name wrong, for instance, thinking it is written: Perceli, Pursely, Presly. The best clarification is to say "like parsley with a U."
Pursley is not a catchy nickname and you will inevitably be called by your first name if this is your surname.
"What's up with your name, is it like - hey, I'm a Wagner because my family used to make wagons?"