Some guild name ideas:

Merchants

Heroes

Blacksmiths

Bakers
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Some more ideas:

Weapon wielders

The Guild of the stealthy and agile




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Some ideas:
The Guild of Bravery
The Guild of Trade
The Guild of Honor
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Here's Some Ideas!
The Vorkutou: Pronouced: Vorkutow (probably would be like the assassins)
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The Matfar: Pronounced: Madvair (probably mages)
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The Wuthdred: Prounounced: Woothdreed (probably warriors)
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The Thii: Pronounced: Thee (probably Vigilantes)
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Here are a few possible guild names :

The Scales - A guild based around fishing and boating (I like that one best)
The Stones - A guild based upon masonry and stone carvings, such as tombstones or statues
The Pines - A guild based around forestry and timber-based construction
The Crowns - A guild based around the trade of jewels and the crafting of jewelry and crowns
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Uhm:

The Rogues

The Shopkeepers

The Nobelty

The Townfolk


So those are pretty simple, but yeah. :|

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Here are some ideas

The weldrol (blacksmiths, bakers, mages, and Goldsmiths)

The galdekai (rogues, thieves, assassins)

The endroc (woodsmen, craftsmen, rangers, forresters)

The prestagio (knights, squires, soldiers, nobles)
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the shadow theives guild ( baldurs gate fan right here haha )
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