Gripen, meaning Giffin in english, is a mythological creature with the body of a lion and the head & wings of an eagle.
Other Swedish aircraft names are Drakken meaning Dragon (we had that yet?) and Viggen, meaning lightning or thunderbolt, I forget which exactly.
Corsair has already been reused on the A-7 relatively recently.
I think mythical creatures could be quite good, TVR name most of their cars after them.
Chimera
Monster with three heads- a goat, a lion, and a dragon (or serpent) for a tail. The Chimera supposedly breathed fire.
Hydra
A serpent/dragon with multiple heads (generally 7 or 9 heads.)
Serpent (Sea Serpent for Naval versions)
Centaur
Half horse, half man.
Satyr
Half man, Half goat. Bearded, sometimes with horns or goat's ears.
Caladrius
A white bird that can predict if a sick person will live or die. If the person is going to die, the bird will look away; if the person is to live, the bird can draw the sickness into itself and then fly into the air, dispersing it.
Halcyon
A sea bird which lays its eggs on the beach in the middle of winter. During the period when the Halcyon is laying and hatching its eggs, the seas are very calm and there is fine weather. That is where the expression "Halcyon days" comes from.
Peryton
A deer with wings, that casts the shadow of a man. Their feathers might be light blue or dark green.
Pegasus
Pegasus is a flying horse from Greek and Roman mythology. He is generally pictured as white, sometimes with golden wings.
Phoenix
The size of an eagle, with gold plumage around the neck, a purple body, and an azure tail. The throat has a crest, and the head has a tuft of feathers.
Kraken
A generic name for a gigantic sea monster. Sometimes described as a whale, sometimes as a giant squid, sometimes as a giant lobster.
Tetramorph
Described by Ezekiel as having the face of a man, the face of a lion, the face of an ox and the face of an eagle, each with four wings, and the hands of a man under the wings. The tetramorph also had wheels that "turned not when they went", and eyes everywhere.
Cerberus
Cerberus, in Greek mythology, was a 3-headed hound, with a snake for a tail. Alternatively, he is described as having 50 heads, or 3 heads with a mane of snakes. In most pictures though, he appears with 3 heads.
Could even call it the Yeti since you hear a lot about it but noone has seen the damn thing
Or maybe a dinosaur name
Pteranodon, Quetzalcoatlus, Pterodactyl
What about insect names following on from the Hornet, could do Wasp (think this was a helicopter way back when), Bumble Bee (pretty lame), American Killer bee (better), Dragonfly (also done), Tarantula hawk
slightly OT but found this list of most painful insect stings while looking for obscure insects
http://en.wikipedia.org/wiki/Schmidt_Sting_Pain_Index
Hope I never meet any bullet ants, ouch!
), we'd have to call it something else because the new Navy helos are already to be called the Cyclone. Hmmm, maybe the Nonskimmer. Yeah! 
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