Hathor

I question the pronunciation. Surely Hat- + Hor should give haht-hor, not hahth-or. Very few languages have -th- as a diphthong: English, Greek, Spanish are all I can think of. It would be odd if the Egyptians did the same.

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Of course, there are no ancient Egyptians left that we could ask. Time machine, anyone?

It's the Hellenized version of the name, so the 'th' diphthong is correct in this case.

TH (in either "thin" or "thus") is not a diphthong.