The name Joffrey is a boy's name of Scottish origin. Joffrey and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
King Joffrey Baratheon, the petulant biological son of siblings Cersei and Jaime Lannisters, is perhaps the most notorious villain in the entire Game of Thrones canon. His name is practically a byword for sadism among fans of the show and George R.R. Martin's books. As such, we think it's probably a name best avoided IRL.