The Fraternal Order of Masons...er...Not Your Business
There Is No Assassin's Guild. Really.
The Order Apologia, with backstory saying that they always apologize to their victims as the last words the victim hears.
Haliburton
The Knives of the Crickets
The Merciful Order of Abnegation
cape and knife - dining school for gentleman
The Black Stabbers.
Depends on the history, founders, traditions and patrons. You might want to look at which deities, devil or demon lords might have influence in a thing like that.
An assassin guild might be dedicated to the demon lord of lycantrophe and have several lycantrophe assassins among it's ranks and all of it's inner circle members are true lycantrophes, Crimson Moon, Blood Moon, Claws of Night, Claws of (patron name), aside from that consider what the people that deal with the guild might name it, a popular name might stick.
If you absolutely need a name, something innoculous or incidental would be good. Kind of an elevated euphamism. Also could be what the assasins did before their career change. Or a family name of sorts.
Gardeners: "pruning" where needed.
"Mr. Johnson"- ripped from Shadowrun; they can all be "Johnson"
Toshers: Historically, they sifted through the sewers looking for anything of value that got lost. Unusual word, and a tosher would do anything for money. Con: Not very sophisticated origin.
Flushermen: Remove the "waste" similar to "plumber"
anything that sounds like an organic moniker more than an official name really.
[insert name of city here] Bakers consortium
Brotherhood of paternal friendship
To the hilt gentleman's club (i like this one)
Poker club
The unseen
The Nameless
Silent Shadows
Just remember, unless you're in Ankh-Morpork an assassins guild isn't going to have a name, it's going to have a cover identity.
The guilds in my campaigns are
Silent Knights
Holy Knights
Vulpinal Aces
Black Mark Sinners
You may use them as you please
*****THE ARISTOCRATS!!!!!*****
