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What are the correct English pronunciations of (Roman emperor) names such as Theodosius, Anastasius, Decius, Leontius, Gratian, Marcian...

I am having difficulties with -tiu vs. -siu, -tia vs. -cia. Should those be pronounced as [ʃə], [tɪə] or [sɪə]?

I was unable to find that online. ("tchrist"'s Wikipedia link on traditional English pronunciation of Latin does not provide an answer. My question is pretty specific about pronunciation of proper Latin names containing -tiu, -siu, -tia and -cia. No such information is to be found anywhere on that webpage. )

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It depends whether you are aiming at Classical (t is /t/, c is /k/), Traditional English (more /s/ and /ʃ/ in your examples) or Catholic (more [ts] and [tʃ]) – Henry Jun 9 '13 at 8:24
@Henry Thanks for you comment. I know the Latin pronunciations (classic or medieval). I am more interested in a detailed description of the common English ones. – Just Jun 9 '13 at 8:31
The issue is that you have specified that the names refer to Roman Emperors. If you had simply asked how you might reasonably pronounce a name you encountered, say Leontius Fortescue-O'Connell, with some other similar examples, it would be relatively easy for the community to answer based on their own regional dialect. – Andrew Leach Jun 9 '13 at 9:09
See this article on the traditional English pronunciation of Latin. – tchrist Jun 9 '13 at 10:57
@tchrist: Your hyperlink took me to a doctoral dissertation. As a student of law, I was hoping I would be given some pointers on how to pronounce some common legal terms. I've tried searching for such a guide online, but thus far I haven't been able to locate a really good one. What search terms might I use to have better success? – rhetorician Jun 9 '13 at 13:23

The short answer is that we pronounce them as though they were English, so for the most part all of those get [ʃ] there. Marcian sounds like a little green Martian.

The values of the vowels are of course different, too, so you get things like Gratian becoming [ˈgreɪʃən]. And you have Cicero becoming [sɪsɨɹoʊ] instead of [ˈkɪkɛɹo] — well, or Tully, which is decidedly odd.

A longer explanation can be found in the Wikipedia article on the traditional English pronunciation of Latin.

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So Theodosius is pronounced [θɪədoʊʃəs] and not [θɪədoʊsɪəs]? – Just Jun 10 '13 at 2:12
@Just Probably. – tchrist Jun 10 '13 at 2:36

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