The numbering method used before WWII can be confusing. To the number of the basic design, which was often also used for the prototype, were appended digits to indicate variations in the design. Hence the Potez 54, 540, 541, 542, and 543 were all closely related designs.
Aiglon Eaglet Alcyon Kingfisher Alize Tradewind Alouette Lark Aquilon Northwind Coleoptere Beetle Criquet Cricket Cyclone Cyclone Dauphin Dolphin Ecureuil Squirrel Entreprenant Enterprising Epervier Sparrowhawk Espadon Swordfish, Broadsword Etendard Banner Farfadet Hobgoblin, Elf Flamant Flamingo Fleuret Ferret, Foil Fregate Frigate (bird) Frelon Hornet Fulgur Lightning Gemeaux Twins Gerfaut Gerfalcon Goeland Gull Griffon Griffon Grognard Grumbler Guerrier Warrior Lama Lama Milan Kite Mirage Mirage Mistral Mistral Luciole Glowworm Mystere Mystery Narval Narwhal Ouragan Hurricane Pelican Pelican Phalene Moth Rafale Squall Ramier Woodpigeon Simoun Simoon Taon Horsefly Toucan Toucan Triton Triton Vanneau Vane Vautour Vulture Zephyr Zephyr