Cowburger?

While eating supper tonight (a hamburger) I was pondering the thought of why we call them hamburgers. They don't come from pigs, A.K.A. ham, so why do we call them hamburgers...?
They should be called beefburgers....or something along those lines...enough with all this false advertising...hamburgers pffft....
Then again, hotdogs aren't made from dogs...or are they? No, no they're not.





















mmm...baby burgers