Leo IV, Pope [a] and the Dragon/Basilisk of Rome
Leo IV, Pope [b]
Leo of Cava and the Dragon of Cava
Lifard / Liphardus of Meung-sur-Loire [a] and the Dragon of Meung-sur-Loire
Machutus (Malo, Maclou, Machutes, Maclovius) of Alet and the Dragon of September Island
Maglorius (Magloire) of Dol and the Dragon of Jersey
Magnus (Magnoaldus) of Füssen [a] and the Dragon of Kempten
Magnus [b]
Mamilianus of Palermo [a] and the Dragon of Montecristo
Marcellus of Paris and a tomb dragon
Marcian and a vestibule dragon
Margaret of Pisidian Antioch (a.k.a. Marina) [a] and the Rufus Dragon
Margaret [b]
Margaret [c]
Margaret [f]
Martha [a] and the Tarasque
Martha [b]
Martha [d]
Martin of Tours [a] and a river-crossing serpent
Mary, Virgin [a] and the Satan-Dragon
Mary [b]
Matthew, apostle [a] and the serpents of Zaroes and Arphaxat
Maurus of Syria and the Dragon of the river Narco
Mewan (Mevennus, Maianus, Men, Méen) of Brittany and the Dragon of Anjou
Michael, archangel [a] and the Dragon of Mt Garganus; and the Dragon of Mons Tumba and the Dragon of Southern Asia
Michael [b]
Michael [c]
Modestinus and the Dragon of Campania
Monegundis and the stomach serpents
Myron of Crete [a] and the Dragon of Raucia