the-events-calendar-event-tickets-attendee-unique-name.js

// Force the Name field in the Event Ticket (Plus) ticket attendee information is unique (which may be intentionally hidden [which makes this even more important since you can see/fix the issue of the name fields needing to be unique per Event Tickets for The Events Calendar, currently & oddly.])
function makeEventTicketAttendeeNamesUnique() {
  $('.tribe-tickets__iac-field--name .tribe-tickets__form-field-input').each(function (i) {
    if (!$(this).hasClass('duplicate-prevented')) {
      var originalValue = $(this).val();
      $(this).val(originalValue + ' #' + (i + 1));
      $(this).addClass('duplicate-prevented');
    }
  });
}
// Only bother running on event detail pages where tickets are offered
$('body.single-tribe_events').on('click change', 'a,button,input', function () {
  // Instant update
  makeEventTicketAttendeeNamesUnique();
  // Account for the modal overlay for ticket info to be shown before augmenting
  setTimeout(function () {
    makeEventTicketAttendeeNamesUnique();
  }, 1000);
  setTimeout(function () {
    makeEventTicketAttendeeNamesUnique();
  }, 5000);
});