hopper (n.1) Look up hopper at Dictionary.com
"person or animal that hops," mid-13c., agent noun from hop (v.). From c.1200 as a surname, and perhaps existing in Old English (which had hoppestre "female dancer").
hopper (n.2) Look up hopper at Dictionary.com
"container with narrow opening at bottom," late 13c., perhaps an agent noun from hop (v.) via notion of grain juggling in a mill hopper.