What Makes Up the Name: jack rabbit + antelope
There are some fictional animal combos too. The taxidermied jackalope always seem to show up in places where people get drunk, have problems with authority, and listen to Jimmy Buffet... or maybe that's just my living room.
Origin: The term for the legendary beast predates a 1977 NYT story. In it, it's claimed that the term and myth was invented in 1934 by two Wyoming brothers.