Lambert is the fan nickname for the Lamb, the unnamed sheep you play, Vessel of the Red Crown and future god of Death.
The Lamb has no canonical name, so the community gave it one. Players call the protagonist "Lambert," but the game itself never names the sheep you spend the whole story leading a cult as.
That blank space is deliberate. Per the wiki, the Lamb is a nonbinary sheep, the last of its kind, and every character in the game addresses it by a different title rather than a real name.
The Lamb is the Vessel of the Red Crown. According to the wiki it is sacrificed and revived by The One Who Waits, given a cult to lead, and can ascend to become the god of Death after defeating Narinder.
This guide covers where the name Lambert comes from, who the Lamb actually is, the many names other characters call it, its fleeces and abilities, and the Goat that mirrors it.
Only to fans. Lambert is a community nickname; the Lamb has no official name in the game.
The player character, a nonbinary sheep and Vessel of the Red Crown.
Cult leader to god. Revived by The One Who Waits, it can become the god of Death.
Everyone has one. Each character calls the Lamb something different, from Little Lamb to Damned Lamb.Lambert is a fan nickname, not a canonical name. The game never names the Lamb, and the wiki itself lists "Lambert" in the Lamb's alias section with the source credited simply as the fandom.
The nickname caught on because the protagonist needs to be called something. "The Lamb" is a title rather than a name, so players settled on Lambert as a friendly stand-in, much like fans naming other silent protagonists across games.
So if you searched for Lambert hoping for an official reveal, the honest answer is that there is not one. The Lamb stays deliberately unnamed, which fits a story about a blank-slate vessel carrying a borrowed crown and a borrowed purpose.
The Lamb is the player character, a nonbinary sheep and the last of its kind. Per the wiki it is the Vessel of the Red Crown, spared from sacrifice and bound into service.
Its whole existence is a second life. According to the wiki, the Lamb is sacrificed and then revived by Narinder, the god of Death, who grants it increased health and durability and demands a cult be built in his name. Even revived, the Lamb can be defeated, returning with only minor penalties.
Its arc ends in godhood. By defeating The One Who Waits, the Lamb can claim the god of Death role for itself, completing the journey from sacrificial victim to deity, the same crown its old master once held.
The Lamb is nameless, but it is not unnamed. The wiki collects a long list of titles each character uses for it, and that list is part of why "Lambert" filled the gap.
The Bishops keep it small. Leshy calls it "Little Lamb," while Shamura calls it "Ignoble Lamb." Narinder calls it the "Damned Lamb," and Yngya, the goddess of the flock, calls it "Shepherd."
The merchants and NPCs are warmer or stranger. The wiki lists Midas calling it "Esteemed Patron," Helob calling it "Number One Customer," Sozo calling it "Mushroom," and Plimbo calling it "Mutton Chop." Stack them all together and the Lamb has dozens of names and no real one.
The name list is a lore tell. In practice, the sheer number of titles, from Promised Liberator to Wretch, shows how differently every faction sees the Lamb. The fandom name Lambert just gives players a single friendly handle for a character everyone else defines by their own agenda.
The Lamb fights up close and changes color with its fleece. Per the wiki its most prominent trait is melee combat prowess, and after its revival it gains extra health and durability from The One Who Waits while still being beatable.
Fleeces reskin and rebalance it. Each fleece the Lamb wears changes its appearance and stats, swapping the default red for gold, green, purple, blue, and more.
The red Lamb (the standard starting look)
Golden Fleece (the gold-tinted Lamb)
Fleece of the Glass Cannon (the green Lamb, lowest health)
Fleece of the Diseased Heart (the purple Lamb)
Fleece of Fragile Fortitude (the blue Lamb)Health swings hard with the fleece. The wiki lists the Lamb as durable as 11 health fully upgraded, down to as little as 1 on the Fleece of the Berserker, so the same protagonist can be a tank or a glass cannon depending on the 
fleece you pick.
The Lamb is not the only playable character. Per the wiki, the Goat is the Lamb's mirror image, a second sheep-like figure who shadows the protagonist.
That mirror gets its own role in co-op. The Goat lets a second player join the cult-running and crusading, standing in as a parallel to the Lamb rather than a separate hero with a separate story.
Together they underline the theme. The Lamb and the Goat are reflections, two faces of the same vessel, which is one more reason the protagonist works better as a nameless figure that players can project onto, Lambert or otherwise.
The Lamb travels well beyond its own game. The wiki notes appearances in other titles including Monster Roadtrip, Balatro, Party Animals, and Don't Starve Together, making the little red sheep one of indie gaming's more recognizable cameos.
Its godhood is canon, not just a build goal. After defeating Narinder, the Lamb officially becomes the god of Death, inheriting the role and the Red Crown, which is why the Mystic Seller and others address it with titles like "Godly One" and "Infant God."
The Lamb, Lambert or not, sits at the center of everything. These guides cover the flock it leads, the Bishops it hunts, and the fleeces it wears.
Game data and screenshots adapted from cult-of-the-lamb.fandom.com, used under CC BY-SA 3.0. Original content remains the property of the wiki contributors and Massive Monster and Devolver Digital.