Littlefoot: Native American style name like “Sitting Bull”
Cera: Tri(cera)tops
Petrie: from Petra meaning Rock in Aramaic, hence St. Peter the Apostle
Ducky: Duckbill Dinosaur
Spike: Named after the Stegosaurus’ main weapon, spikes on the tail.
Ruby: Rubies, her coloring, rubies are semi-precipus stone that are red and yet give off pink colors too.
Chomper: Named after his distinct Sharptooth bite, to chomp. Thankfully Shingeru Miramoto has not sued over the fact that one of the Super Mario Bros. antagonists is chomper, a large or little black orb with sharp teeth and eyes that is a dog in the Mushroom Kingdom.
Wild Arms: Named for his wild Italiano hand gestures when talking.
Topsy: Mr. Threehorn’s nickname derives from his weakness of being top heavy and falling over and unable to get up.
Ali: Apatosaurus Lady-isaur
Pterano: Terror, Tyrant, Pterosaur