Dwayne, believe that the precursor of the 'popover' was the venerable English 'Yorkshire Pudding', which was a fair bit larger, but, I believe, of the same type(& apparantly one of the few types of Old English food besides the Beef Wellington, & desserts, that had much interesting character/reputation at all).
So if you would really like to try making them, would suggest not only using the much older/larger style of the #10 molds, but if you can cadge one, yaffle one of the Favorite 9-cup 'Popover' molds -- which are huge, & should make wonderful Popovers/Yorkshire Puddings.