I have been working off of these two answers:

although this is not the absolute best way to do it. It will work without adding a bunch of javascript to another file. There are also easy ways to use wp_add_inline_script to properly enqueue your script conditionally.

So if you add the following to your contact form... it will work.

<script type="text/javascript">
jQuery(function($) {
  //determine the previous page,
  let page = document.referrer, opt = '';
  switch(true){
    case page.indexOf('douglas-h-flint') > -1:
      opt = 'douglashflint';
      break;
    case page.indexOf('john-f-connolly') > -1:
      opt = 'johnfconnolly';
      break;
    case page.indexOf('david-l-walker-jr') > -1:
      opt = 'davidlwalkerjr';
      break;
  }
  $('select[name="select-recipient"]').find('option[value="' opt '"]').prop('selected', true);
});
</script>