Pierre Bonaccord was the first Supreme Mugwump of the International Confederation of Wizards. Bonaccord wanted to ban troll-hunting and grant rights to trolls, possibly full "being" status. However, a tribe of Mountain Trolls had been causing a lot of trouble in Liechtenstein, so their wizarding community contested Bonaccord's appointment, and refused to join the Confederation as a result.
- "Pierre" is a French form of Peter. This name was also borne by Pierre-Auguste Renoir (1841-1919), a French impressionist painter, and by Pierre Curie (1859-1906), a physicist who discovered radioactivity with his wife Marie.
- A "bon-accord" is an expression or token of good will.
- Harry Potter and the Order of the Phoenix (Mentioned only)