Vocative of -eus adjectives and nouns

Saluete! I’ve encountered a bit of a conundrum; I cannot remember if there be a rule for the vocative for masculine adjectives or nouns ending in ‘-eus’, for example “aureus” or “capt?neus.” I feel like I read somewhere that “auree” would not be preferred, and “aurī” instead would occur, like “mī,” yet I haven’t been able to confirm this. Does anyone recall?

I have not heard of a rule regarding nouns ending in -eus, but that is not to say there is not one. Masculine nouns ending in -ius (e.g. fīlius) do however lengthen the final i in the vocative rather than ending in -e (e.g. fīlī, not fīlie). Perhaps this is the rule you are thinking of?

Naturally that rule I know well; I’ve not encountered, however, any vocative ‘-eus’ form that I can think of, and so I wondered.

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I believe the -ius rule also applies to -eus nouns. At least that’s how I learned it in high school: -us is replaced with -e and -ius/-eus is replaced with -i.

As far as I know, there is no special vocative form for -eus.

that’s the approach I’ve been taking. I think we’ve already had this convo, maybe there’s something useful in the previous thread. it’s back there somewhere, I think Amadeus was asking about the voc of his username or something… hmm.

Ok, this is what an old Spanish textbook says:

Se ignora cuál haya sido el vocativo singular de deus. En el estilo eclesiástico se usa el vocativo > Deus> . Translation: It is not known what the vocative of deus was. In the ecclesiastical style, the vocative > Deus > is used.

But then, in another section called “Declinación de los sustantivos griegos”, we read:

Los nombres proprios, que en griego terminan en > eús, > gen. en > éos, > y pertenecen en dicho idioma a la tercera declinación, en latín siguen la segunda.

Ej.: > Prométheus, > gen. > Prométhei > …

Sin embargo, el vocativo es en > -eu, > comoen griego: > Prométheu> …

And this is all well and good, but the names Amadeus and aureus are not greek. So, yes, quite a conundrum.

Valete!

I’ve answered my own question:

http://216.239.51.104/search?q=cache:iBAgZanU54QJ:www.forumromanum.org/latin/nouns.html+latin+vocative+eus&hl=en&gl=us&ct=clnk&cd=2&client=safari

Both ‘-ius’ and ‘-eus’ become Ä«.

Aurī (i), but Orpheū (u because Orepheus is Greek).

Source for former rule: Google cache.

That’s never happened to me before. Oh well - yes that’s right.

Wow, what a unified vibe there. Woot.