The standard of counting as "Tiffany" is strange. He's not happy with Θεοφανώ or Theophania, but he's perfectly happy to count (French) Tiphaine, Thifaine, Thiephaine, and (English) Tephany as being "obviously" the modern name. But the difference between Tephany and Theophania is down to the "Th" at the beginning. Why agonize over the difference between the very well-attested Greek Theophania and modern Tiffany if it's so clear that medieval Tephany matches the modern form? It's a better match for the Greek form!