Sir Mungo Malagrowther of Girnigo Castle
character in The Fortunes of Nigel (1822) by Walter Scott
St. Mungo's Hospital for Magical Maladies and Injuries
from the Harry Potter series
Mungojerrie
cat in T. S. Eliot's "Old Possum's Book of Practical Cats" and musical "Cats," partner of Rumpelteazer
Mungo Jerry
British band with the 1970 hit "In the Summertime"