Mall or Pall Mall (London). From the Latin pellere mallco (to strike with a mallet or bat; so called
because it was where the ancient game of pell-mall used to be played. Cotgrave says:-

“Pale malle is a game wherein a round boxball is struck with a mallet through a high arch of
iron. He that can do this most frequently wins.”

It was a fashionable game in the reign of Charles II., and the walk called the Mall was appropriated to it
for the king and his court.

I remember being told when i was in highschool, it was always pronounced "pell mell" Is this still true?