What's the Kennection? #50

What third and last wife of Julius Caesar has a dream predicting his murder, according to Shakespeare?

What herb flavors the salmon in Swedish gravlax—and is used in American pickling as well?

What "truly outrageous" stage name does Jerrica Benton use when she becomes the lead singer of the Holograms?

What did Philadelphia fans famously do to greet Santa Claus at a December 1968 Eagles game?

What's the only piece in a game of Stratego that can move more than one space in a turn?

What's the "Kennection"?