Headmaster

A headmaster or headmistress is the head of a School of Magic.

Some well known headmasters or headmistresses of Hogwarts are Dilys Derwent (1741-1768)
 * Everad
 * Phineas Nigellus Black


 * Armando Dippet (Unknown-1956)
 * Albus Dumbledore (1956-1997)
 * Minerva McGonagall (1993, 1997, and onward from 1998, but was 19 years later replaced)
 * Dolores Umbridge (early 1996-removed from post a few days later) (Appointed by Ministry of Magic)
 * Severus Snape (1997-1998)

Other known headmasters or headmistresses:
 * Igor Karkaroff of Durmstrang Institute (Unknown-1995)
 * Madame Maxime of Beauxbatons (Unknown-possibly present)