- Mr Krum — father of Viktor Krum
- Mrs Krum — mother of Viktor Krum
- Viktor Krum — a student of Durmstrang Institute, Triwizard Champion, and professional Seeker
- A wizard who was killed by Gellert Grindelwald
Krum of Bulgaria was a ninth-century ruler of Bulgaria who greatly expanded his country's territory and who instituted the first known written Bulgarian law code giving state protection to the poor.