User blog comment:B214/High School DxD EX/@comment-26535460-20151114003037/@comment-180.243.125.192-20151116151159

(for those who are wondering, I'm the chapter 3 summary poster :D): I don't need to add the confusion of Ex's title and sword name since you've already figured out. "God-Slayer..." is his title he got within the Alliance, "Scarlet Blade Galatine III" is the sword's name, full stop :).

Again, the UL top brass beings' names are still YMMV, no single solid forms are agreed because the official transliterations are still not present. As Jop had mentioned, those are just temporary readings, so we need to whether we wait for it (I'm not monitoring Ishibumi's blog, so this depends on other users) or work it out on our own and make a consensus. Yeah, because they are ETs and the names are not using familiar transliterated names like the original Four Satans (let alone Ishibumi bothering by using Romaji because of obvious reasons), we can just simply ignore it and use the original katakana form in the Romaji reading without further transliteration, but often, us fans want to know why they bear that name, hence the transliteration into full English (or better read whatever foreign name it is).

As for the katakana forms of the names, I agree with some of it. I rechecked again with several sites like Monash' Japanese central and my Japanese major friends, the Japanese spelling of hydra have two forms: ヒュドラー is for the real life hydra, the smaller one that lives in the sea, and  ハイドラ for the mythological Greek hydra. As for イドゥラ、reading, "Idoura" or "Idura" are possible, since the kana u can both extend the o spelling or replace it.

For レンズォ reading, both "Renzuo" and "Renzo" are possible, and as I recall and look up again, Renzo is a person's name (as in Renzo Gracie, one of the Brazilian Jujutsu pioneers and an MMA coach), it is a short form of Lorenzo in Italian.

With Fafnir's title TL in Airi's ASG name (and to the extension of Asia's title given by Belial in volume 20), both "Golden Dragon Monarch" and "Golden Dragon King" are correct, it's just a matter of preference :D.

with the ベゥパ and レコルグ, seems like you're right. Most reads ベゥパ as you mentioned and my friend even thought it was "Vespa".

Now that they have been partially "decoded", it seems like the UL names mentioned in chapter 3 are partially Italian, hence the missing transliteration in English names or terms :D.