User blog comment:Hawkinz340/Chapter 718 review/@comment-13876472-20130821161022/@comment-5962458-20130821175717

Nop, not directly. It's a pun, a play on words, like for example Zoro's attack "Onigiri" means both "demon slash" and it's a japanese rice-dish.

Luffy's attacks are named after weapons which contain animals in their names.

Grizzly Magnum: It's a weapon but also Grizzly is a bear.

Red Hawk: It's a weapon but also Hawk is also a bird of pray.

Elephant gun: It's a weapon but also an Elephant is, well... an elephant!

Got the idea?