New Code names for characters that you want to drop the current ones

[scary harpy]

...

Tim Drake could be Cardinal and Cassie could be Fury. I got used to Cassandra Cain's codename, Orphan, but I think Silhouette could be a nice name for her.

...

Silhouette is perfect and about 100x better than Orphan and Black Bat.

Silhouette is perfect for Cassandra...she's the Shadow of the Batgirl!

That is if Silhouette at Marvel is okay with her name being used.

A very minor Marvel character.

[Tzigone]

Before this thread, I didn't know no one liked Black Bat for Cass. I didn't read in that era, though, so don't know if there are some negative connotations there. I don't like Orphan, though.

[scary harpy]

Kon is simply Kon-El. He doesn't need another code name.

Babs is Oracle because she chooses to be...and sometimes Batgirl.

Donna could be Donna Wonder...it would be a name all her own...and not an insult like Troia.

Tim is...I don't know...I've lost hope for him...

Kara should be Superwoman; we need a heroic Superwoman. We also need someone else to be Supergirl.

Cassie could be Amaze.

Jon is Superboy for the far future.

Wallace is the only Kid Flash...so he can be Kid Flash for a long time. And maybe Impetus when he's an adult?

Kimiyo Hoshi could be Hikari...a Japanese word for 'light'

Tomorrow Woman is another character...and a good one.

Redwing was also a member of the Team Titans...and maybe a vehicle for Tim Drake.

Ray Palmer could join Justice Incarnate like Barry Allen...leaving Ryan Choi as the Atom.

[hareluyafan1]

Before this thread, I didn't know no one liked Black Bat for Cass. I didn't read in that era, though, so don't know if there are some negative connotations there. I don't like Orphan, though.

I like Black Bat. It's a cool name.

[Digifiend]

Redwing was also a member of the Team Titans...and maybe a vehicle for Tim Drake.

The car was called Redbird.

[Mutant God]

Naomi - Omega Girl
Jason Todd - Silverwing
Rick Flag Jr. - Captain Combat

[Comic-Reader Lad]

You know who DESPERATELY needs new code names? The Marvel Family.

I reject the idea that Billy should be called "Shazam," and I'll never call him that.

I would go with:

Captain Marvel → Captain Thunder

Mary Marvel → Olympia

Captain Marvel Jr. -I don't want "Captain Thunder, Jr." as I agree with the OP that each character should have a unique name, not a spinoff name. Let's not even mention "CM3."

So, I'm kind of stuck on Freddy.

Does anyone have any suggestions for Freddy or Billy & Mary?

[John Venus]

Not being in the described group, I won't speak for anybody. I've just never heard it used affectionately.

I have seen it used humorously before albeit as an in-joke. It was tagged as offensive when I looked it up hence why I edited out that joke.

[Mutant God]

You know who DESPERATELY needs new code names? The Marvel Family.

I reject the idea that Billy should be called "Shazam," and I'll never call him that.

I would go with:

Captain Marvel → Captain Thunder

Mary Marvel → Olympia

Captain Marvel Jr. -I don't want "Captain Thunder, Jr." as I agree with the OP that each character should have a unique name, not a spinoff name. Let's not even mention "CM3."

So, I'm kind of stuck on Freddy.

Does anyone have any suggestions for Freddy or Billy & Mary?

The Justice (Just us) Family
Billy - Captain Justice
Freddy - King Justice
Mary - Queen Justice
Pedro - Big Justice
Eugene - Sir Justice
Darla - Lady Justice

[godisawesome]

I don't find Red Robin or Black Bat to be bad names; I think both worked great in their heyday before the New 52. Red Robin, however, pretty much requires the cowled costume, in my opinion, or else it’s pointless, and Black Bat having been resurrected by Dynamite is irritating.

I’m certain there ar better alternatives, but here’s an idea for “shared IDs” among the Batmfamily:

Shadows of the Bat

Tim: Shadowbat Red

Cass: Shadowbat Black

I do actually like Scion for Conner, though maybe as a full title - The Scion, Kon-El

For Wallace: Bolt

[Lonewolf36]

Cardinal - Tim Drake
Phenom - Donna Troy
Rook - Damian Wayne
Scion - Kon-El
Seraph - Linda Danvers
Starlight - Kimiyo Hoshi

[Digifiend]

For Wallace: Bolt

Bolt is taken by another speedster, in Teen Titans Academy.

[John Venus]

Silhouette is perfect for Cassandra...she's the Shadow of the Batgirl!

You know I would settle for 'Shadow of the Bat' if she can't have Black Bat or Batgirl. Shadow Bat? Bat Shadow?

Kon is simply Kon-El. He doesn't need another code name.

Babs is Oracle because she chooses to be...and sometimes Batgirl.

Donna could be Donna Wonder...it would be a name all her own...and not an insult like Troia.

Tim is...I don't know...I've lost hope for him...

Kara should be Superwoman; we need a heroic Superwoman. We also need someone else to be Supergirl.

Cassie could be Amaze.

Jon is Superboy for the far future.

Wallace is the only Kid Flash...so he can be Kid Flash for a long time. And maybe Impetus when he's an adult?

Kimiyo Hoshi could be Hikari...a Japanese word for 'light'

Tomorrow Woman is another character...and a good one.

Redwing was also a member of the Team Titans...and maybe a vehicle for Tim Drake.

Ray Palmer could join Justice Incarnate like Barry Allen...leaving Ryan Choi as the Atom.

Troia is fine, if we had to account for how every character's name is interpreted in other countries, nobody would have names.

Wallace would logically graduate to 'Flash' from Kid Flash.

I like the idea of a Japanese code name but something stronger than just Hikari. This is something that someone from Japan can better answer.

[Lonewolf36]

Aquarius - Arthur Joseph Curry
Iron Maiden - Natasha Irons - which was used in the 52 Novelization
Micro - Ryan Choi
Titania - Donna Troy

[Digifiend]

Titania is a Marvel villain.
https://marvel.fandom.com/wiki/Mary_...an_(Earth-616)