Amphithere
Apep/Apophis
Azhi Dahaka
Basilisk
Bakonawa
Biscione
Cockatrice
Dragon
Drake
Echidna (Greek)
Fafnir
Feathered serpent
Gorgon (including Medusa) (Greek)
Hoop snake
Hydra (Greek)
Jaculus/Jaculi
Jasconius
Jörmungandr (the Midgård serpent)
Lamia
Lindworm
Madame White Snake
Meretseger
Mongolian Death Worm
Naga (Worldwide)
Níðhöggr
Orm
Ouroboros
Python
Rainbow serpent
Sea serpent
Tarasque
Tsuchinoko
Typhon
Wyvern
Yamata no Orochi
Zilant

Thank you very much for reading!