Tree of the Monsters

  Chaos             Pontus=Gaia      
  |             |      
  Tartarus=Gaia           Phorcys+Ceto Nereus Thaumas Eurybia  
  |             |        
Delphyne Typhon + Echidne The Sirens Enyo Pemphredo Deino Poseidon=Medusa=Hephaestus Euryale=Poseidon Stheino Skyla Ladon
    |           | | |      
Chimera Cerberus Grifon Vulture Orthrus+Echidne Hydra   Pegasus Chrysaor   Cacus   Orion    
      |       |          
    Sphinx Nemean Lion     Geryoneus          

Key:-
"|" = Family
"_" = Child of Above Parent.
" " = If no Underline then they are not related by birth
"=" = Sexual Partner. If partner is not sibling then their name is not Underlined
"+" = Marriage Partner
Bold Text = A God, Titan or other Daity
Plain Text = Mortal

Greek Mythology