There are a couple of other Dragonflys you missed:
Boeing X-50 Dragonfly, an unmanned aerial surveillance vehicle designed by the U.S. military
Cessna A-37 Dragonfly, a US attack aircraft
DF Helicopters DF334 (Dragon Fly 334), an Italian helicopter
De Havilland Dragonfly, a British aircraft
Dornier Do 12 Libelle III (Dragonfly III), a German flying boat
FlyTech Dragonfly, a remote-controlled flying toy ornithopter
Moyes Dragonfly, an Australian ultralight aircraft
Sikorsky H-5, a US helicopter sometimes called Dragonfly
Westland Dragonfly, the UK version of the Sikorsky H-5
[*]Trek Aerospace Dragonfly, a VTOL aircraft
[*]Viking Dragonfly, an experimental equal-area canard airplane
DragonFly (spacecraft), an asteroid material-sampling spacecraft proposed by Deep Space Industries
There's a Cessna Dragonfly at Temora.
How about Ladybird or Ladybug?
Or Damselfly is closely related to Dragonfly.