St. Mungo was not killed, he died a natural death.
St Mungo's Academy was created in 1858.
St. Mungo on January 13, 603, in Glasgow, Scotland of natural causes.
St. Mungo, also known as St. Kentigern, is said to be buried at the Glasgow Cathedral in Scotland. The cathedral, also known as St. Mungo's Cathedral, is dedicated to him and is believed to be his final resting place.
St. Mungo was ~85 years old at his death in the year ~603.
St Mungo's Hospital for Magical Maladies and Injuries
Saint Kentigern, also known as St. Mungo, is the patron saint of Glasgow, Scotland, and salmon.
The ward for potion and plant poisoning is on the 3rd floor of the St. Mungo's building. (Harry Potter)
Saint Kentigern (Mungo) was born about the year 518 at Culross, Fife, Scotland.
Saint Kentigern (Mungo) died on January 13, 603, in Glasgow, Scotland of natural causes.
Saint Kentigern (Mungo) died on January 13, 603, in Glasgow, Scotland of natural causes.
Because Neville's parents are in St. Mungo's because they got tortured to the point of insanity with the Cruciatus curse by ( i believe) four Death Eaters.
I have placed a link to the biography of St. Mungo below so that you can determine for yourself why he was accorded the honor of saint.