The Supreme Mugwump is the title held by the head of the International Confederation of Wizards (ICW).
Pierre Bonaccord was the first Supreme Mugwump of the ICW. His appointment was contested by wizards from Liechtenstein because of his views on troll hunting (OP31).
Albus Dumbledore served as Supreme Mugwump during his tenure as Headteacher of Hogwarts School (PS4, OP15, TBB).
Babajide Akingbade became Supreme Mugwump after Dumbledore (Pm).
Mugwump is derived from the Native American Algonquian word mugquomp, meaning "big chief". It's modern meaning refers to a person who remains aloof or independent from politics (Oxford English Dictionary).
Lexicon list of International Government Officials
From the Web
Oxford Dictionaries blog: What on earth is a mugwump?
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