The next is for groups of people

The Hidden Ones
DC - a group of genetic witches, also known as Homo magus - Justice League of America #164
Marvel - a group of Inhuman outcasts from Fantastic Four #51-54 (Volume 3)

Green Lantern #49 featured a villain named The Dazzler.
Marvel, of course, has a character named Dazzler, you might have heard about.

KAM -- as I recall, while I was working on my Third Draft I realized that I didn't know what characters, aside from those created for the Ultraverse of the mid-90s, had passed into Marvel's control when they bought Malibu. I have a few odds and ends from other Malibu titles in my collection -- at least one Ex-Mutants TPB, and maybe a couple of issues of Protectors -- but I'm no expert on the subject of all that they published and who each character concept belonged to. That was another subject I filed away for a rainy day -- "worry about it for the Fourth Draft!"

I've paid no attention to anything that's been done with the name "Infinity Inc." in the last few years, so I didn't know anything about the latest Fury.

I probably should mention that the names I've supplied of Metal Men, Flash, Metamorpho Spider-Man villains came from comics I own. The rest came from comic reference books or online references.

Kind of got lost when I rewrote that part.

Creeper - original Marvel Creeper was a funny animal villain in the 1940s

Falcon - also a Marvel hero in the 1940s

Nightshade was also a DC villain in a 1940s story

---

More DC Elements

Metamorpho fought a team of villainous robots named Hafnium, Osmium, Selenium, Strontium, Tantalium & Thallium.

---

Missing shared names

El Diablo
DC - originally a villain in a 1938 story, later the names of 2 heroes
Marvel - a Sub-Mariner villain from 1955

Hercules (as far as I know these characters were not the mythical one)
DC - a superstrong hero from the 1940s in Quality comics
Marvel - a giant superstrong genius in the 1940s

Nightman/The Night Man
DC - apparently a Batman replacement from a World's Finest story
Marvel - Malibu property, purchased by Marvel

Shade
DC - Golden Age villain
Marvel - 2001 Spider-Man villain

Sin-Eater
DC - Thanagaran devil
Marvel - Insane killer

The Thunderer
DC - Metamorpho villain
Marvel - Golden Age hero who later changed name to Black Avenger

---

When Marvel bought Malibu did they get the rights to the Protectors? If so then there would be 1-3 more.

Amazing Man
DC - several heroes
Malibu, revival of old Centaur Comics character

Fantom Of The Fair/Phantom Of The Fair
DC - retconned Golden Age villain from a 1980s story
Okaaaaaaaayyyyyyy... the character of Gravestone was originally known as the Fantom Of The Fair. I do not know if Malibu's version of the character was said to have used the Fantom Of The Fair name, though.

The Arrow
I think a character calling himself The Arrow might have appeared as either a villain or wannabe hero in an early Superman story, but I'll have to double-check.

Metal Men opponents the Gas Gang included 2 elements, Oxygen & Helium. (The other 3 were compounds, Chloroform, Cabon Monoxide & Carbon Dioxide.)

In his first appearance, the Flash villain, Mr. Element said that his 6 henchmen were named after the 6 inert elements, although only four were actually named in that issue, Argon, Krypton, Radon & Xenon. The other two should be Helium & Neon. I don't know if the henchmen ever appeared again.

Static's civilian identity was named after the first African-American to go to law school, who was himself named after the Roman poets Virgil and Ovid.

Later that night, when I was typing out a "Static" listing, I then "thought I remembered" that his name was simply Virgil Ovid. If I'd gone back to that Wikipedia article to double-check, I would have learned, of course, that it was actually "Virgil Ovid Hawkins." As I've said before and will say again, my memory definitely is not photographic!

Although that would be a pretty cool name!

I think you missed the word "never" at first glance.

I thought some of his stuff that I read was pretty good, but a lot of it just left me feeling dissatisfied, and I never fell in love with his work. Zsasz, for instance, just bored me, and while I thought the Ventriloquist and Scarface were amusing the first time I saw them in action, I got less and less interested each time I saw them again. I wasn't happy with Breyfoggle's way of drawing Batman either, if the truth be known (although I've seen Breyfoggle do other work which I quite liked -- on Ultraverse's "Prime," for instance). But his Batman just doesn't look right to me.

Apologies for making you repeat yourself... I missed that first time around

I wasn't kidding when I said, near the top of this list, that I originally estimated there wouldn't be much more than 30 duplications between the aliases of Marvel and DC characters. If I had realized the true magnitude of the phenomenon of recycling colorful names from the competition, then I might have reconsidered the whole idea . . . but I didn't. And once I had publicly committed myself to compiling such a list, I felt obligated to follow through with it and provide occasional updates to boot!