John Hayward-172
John Hayward-621
John Hayward-1111
John Hayward-1729
all died on the same day. Some were born the same day as well. But none of them seem to be the same person.
Even if they are four distinct people it's easy for the incorrect death date to have propagated. For example, http://www.wikitree.com/wiki/Hayward-172 has a burial date of 1710, five years after his death.