diff --git a/.gitignore b/.gitignore
index e7368a51..646df245 100755
--- a/.gitignore
+++ b/.gitignore
@@ -12,7 +12,10 @@ build/
 env/
 lib64
 .mypy_cache/
+.ruff_cache/
 .pytest_cache
 tmp
 .coverage
+.python-version
 .venv
+.vscode
\ No newline at end of file
diff --git a/bot/extensions/name_moderation_cog.py b/bot/extensions/name_moderation_cog.py
new file mode 100644
index 00000000..e84d7aed
--- /dev/null
+++ b/bot/extensions/name_moderation_cog.py
@@ -0,0 +1,82 @@
+import logging
+
+from discord import Member
+from discord.errors import Forbidden
+from discord.ext.commands import Cog
+
+from bot import app
+from bot.grace import Grace
+from bot.helpers.log_helper import notice
+from bot.services.random_name_service import make_random_name
+
+logger = logging.getLogger(__name__)
+
+
+class NameModerationCog(
+    Cog, name="Names", description="Checks and changes user's nickname."
+):
+    """
+    A cog that checks when a member joins if they have a bad word in their name,
+    and changes their name in case they do.
+
+    Configure in the .env file like this:
+        BLACKLISTED_NAMES = bad_word1, bad_word2, bad_word3,...
+    """
+
+    def __init__(self, bot: Grace):
+        self.bot: Grace = bot
+        self.bad_words = set(app.config.get("name_moderation", "blacklist", []))
+
+    @property
+    def moderation_channel(self):
+        return self.bot.get_channel_by_name("moderation_logs")
+
+    @Cog.listener()
+    async def on_member_join(self, member: Member) -> None:
+        """Chnage a user's nickname if it contains a bad word.
+
+        :param member: The member to check their username or display name.
+        :type member: discord.Member
+        """
+
+        name = member.display_name
+
+        if not self.contains_bad_word(name):
+            return
+
+        try:
+            good_name = make_random_name()
+            await member.edit(nick=good_name)
+
+            log = notice("NAME", f"Username of {name} was changed.")
+            log.add_field(
+                "Reason: ",
+                f"User {name} joined with an inappropriate name, thus it was changed to {good_name}.",
+            )
+
+            if self.moderation_channel:
+                await log.send(self.moderation_channel)
+
+            await member.send(
+                f"Your name has an inappropriate word in it, thus it was changed from {name} to {good_name}."
+            )
+
+        except Forbidden:
+            logger.info("User left before we could send them a message.")
+
+    def contains_bad_word(self, name: str) -> bool:
+        """Checks if a name has a bad word in it.
+
+        :param name: The name to check.
+        :type name: str
+
+        :return: True if the name has a bad word, otherwise false.
+        :rtype: bool
+        """
+        lowered = name.lower()
+
+        return any(bad_word in lowered for bad_word in self.bad_words)
+
+
+async def setup(bot: Grace):
+    await bot.add_cog(NameModerationCog(bot))
diff --git a/bot/services/random_name_service.py b/bot/services/random_name_service.py
new file mode 100644
index 00000000..5a45d8a6
--- /dev/null
+++ b/bot/services/random_name_service.py
@@ -0,0 +1,364 @@
+import random
+
+# source : https://github.com/moby/moby/blob/master/internal/namesgenerator/names-generator.go
+_LEFT = [
+    "admiring",
+    "adoring",
+    "affectionate",
+    "agitated",
+    "amazing",
+    "angry",
+    "awesome",
+    "beautiful",
+    "blissful",
+    "bold",
+    "boring",
+    "brave",
+    "busy",
+    "charming",
+    "clever",
+    "compassionate",
+    "competent",
+    "condescending",
+    "confident",
+    "cool",
+    "cranky",
+    "crazy",
+    "dazzling",
+    "determined",
+    "distracted",
+    "dreamy",
+    "eager",
+    "ecstatic",
+    "elastic",
+    "elated",
+    "elegant",
+    "eloquent",
+    "epic",
+    "exciting",
+    "fervent",
+    "festive",
+    "flamboyant",
+    "focused",
+    "friendly",
+    "frosty",
+    "funny",
+    "gallant",
+    "gifted",
+    "goofy",
+    "gracious",
+    "great",
+    "happy",
+    "hardcore",
+    "heuristic",
+    "hopeful",
+    "hungry",
+    "infallible",
+    "inspiring",
+    "intelligent",
+    "interesting",
+    "jolly",
+    "jovial",
+    "keen",
+    "kind",
+    "laughing",
+    "loving",
+    "lucid",
+    "magical",
+    "modest",
+    "musing",
+    "mystifying",
+    "naughty",
+    "nervous",
+    "nice",
+    "nifty",
+    "nostalgic",
+    "objective",
+    "optimistic",
+    "peaceful",
+    "pedantic",
+    "pensive",
+    "practical",
+    "priceless",
+    "quirky",
+    "quizzical",
+    "recursing",
+    "relaxed",
+    "reverent",
+    "romantic",
+    "sad",
+    "serene",
+    "sharp",
+    "silly",
+    "sleepy",
+    "stoic",
+    "strange",
+    "stupefied",
+    "suspicious",
+    "sweet",
+    "tender",
+    "thirsty",
+    "trusting",
+    "unruffled",
+    "upbeat",
+    "vibrant",
+    "vigilant",
+    "vigorous",
+    "wizardly",
+    "wonderful",
+    "xenodochial",
+    "youthful",
+    "zealous",
+    "zen",
+]
+
+_RIGHT = [
+    "agnesi",
+    "albattani",
+    "allen",
+    "almeida",
+    "antonelli",
+    "archimedes",
+    "ardinghelli",
+    "aryabhata",
+    "austin",
+    "babbage",
+    "banach",
+    "banzai",
+    "bardeen",
+    "bartik",
+    "bassi",
+    "beaver",
+    "bell",
+    "benz",
+    "bhabha",
+    "bhaskara",
+    "black",
+    "blackburn",
+    "blackwell",
+    "bohr",
+    "booth",
+    "borg",
+    "bose",
+    "bouman",
+    "boyd",
+    "brahmagupta",
+    "brattain",
+    "brown",
+    "buck",
+    "burnell",
+    "cannon",
+    "carson",
+    "cartwright",
+    "carver",
+    "cerf",
+    "chandrasekhar",
+    "chaplygin",
+    "chatelet",
+    "chatterjee",
+    "chaum",
+    "chebyshev",
+    "clarke",
+    "cohen",
+    "colden",
+    "cori",
+    "cray",
+    "curie",
+    "curran",
+    "darwin",
+    "davinci",
+    "dewdney",
+    "dhawan",
+    "diffie",
+    "dijkstra",
+    "dirac",
+    "driscoll",
+    "dubinsky",
+    "easley",
+    "edison",
+    "einstein",
+    "elbakyan",
+    "elgamal",
+    "elion",
+    "ellis",
+    "engelbart",
+    "euclid",
+    "euler",
+    "faraday",
+    "feistel",
+    "fermat",
+    "fermi",
+    "feynman",
+    "franklin",
+    "gagarin",
+    "galileo",
+    "galois",
+    "ganguly",
+    "gates",
+    "gauss",
+    "germain",
+    "goldberg",
+    "goldstine",
+    "goldwasser",
+    "golick",
+    "goodall",
+    "gould",
+    "greider",
+    "grothendieck",
+    "haibt",
+    "hamilton",
+    "haslett",
+    "hawking",
+    "heisenberg",
+    "hellman",
+    "hermann",
+    "herschel",
+    "hertz",
+    "heyrovsky",
+    "hodgkin",
+    "hofstadter",
+    "hoover",
+    "hopper",
+    "hugle",
+    "hypatia",
+    "ishizaka",
+    "jackson",
+    "jang",
+    "jemison",
+    "jennings",
+    "jepsen",
+    "johnson",
+    "joliot",
+    "jones",
+    "kalam",
+    "kapitsa",
+    "kare",
+    "keldysh",
+    "keller",
+    "kepler",
+    "khayyam",
+    "khorana",
+    "kilby",
+    "kirch",
+    "knuth",
+    "kowalevski",
+    "lalande",
+    "lamarr",
+    "lamport",
+    "leakey",
+    "leavitt",
+    "lederberg",
+    "lehmann",
+    "lewin",
+    "lichterman",
+    "liskov",
+    "lovelace",
+    "lumiere",
+    "mahavira",
+    "margulis",
+    "matsumoto",
+    "maxwell",
+    "mayer",
+    "mccarthy",
+    "mcclintock",
+    "mclaren",
+    "mclean",
+    "mcnulty",
+    "meitner",
+    "mendel",
+    "mendeleev",
+    "meninsky",
+    "merkle",
+    "mestorf",
+    "mirzakhani",
+    "montalcini",
+    "moore",
+    "morse",
+    "moser",
+    "murdock",
+    "napier",
+    "nash",
+    "neumann",
+    "newton",
+    "nightingale",
+    "nobel",
+    "noether",
+    "northcutt",
+    "noyce",
+    "panini",
+    "pare",
+    "pascal",
+    "pasteur",
+    "payne",
+    "perlman",
+    "pike",
+    "poincare",
+    "poitras",
+    "proskuriakova",
+    "ptolemy",
+    "raman",
+    "ramanujan",
+    "rhodes",
+    "ride",
+    "ritchie",
+    "robinson",
+    "roentgen",
+    "rosalind",
+    "rubin",
+    "saha",
+    "sammet",
+    "sanderson",
+    "satoshi",
+    "shamir",
+    "shannon",
+    "shaw",
+    "shirley",
+    "shockley",
+    "shtern",
+    "sinoussi",
+    "snyder",
+    "solomon",
+    "spence",
+    "stonebraker",
+    "sutherland",
+    "swanson",
+    "swartz",
+    "swirles",
+    "taussig",
+    "tesla",
+    "tharp",
+    "thompson",
+    "torvalds",
+    "tu",
+    "turing",
+    "varahamihira",
+    "vaughan",
+    "villani",
+    "visvesvaraya",
+    "volhard",
+    "wescoff",
+    "wilbur",
+    "wiles",
+    "williams",
+    "williamson",
+    "wilson",
+    "wing",
+    "wozniak",
+    "wright",
+    "wu",
+    "yalow",
+    "yonath",
+    "zhukovsky",
+]
+
+
+def make_random_name() -> str:
+    """Makes a random two words name.
+
+    :return: The random name generated by the function.
+    :rtype: str
+    """
+
+    name = f"{random.choice(_LEFT)} {random.choice(_RIGHT)}".title()
+
+    return name
diff --git a/config/settings.cfg b/config/settings.cfg
index c9c89b5e..4724db7c 100644
--- a/config/settings.cfg
+++ b/config/settings.cfg
@@ -29,3 +29,6 @@ minimum_account_age = 30
 
 [reddit]
 blacklist = ${REDDIT_BLACKLIST}
+
+[name_moderation]
+blacklist = ${BLACKLISTED_NAMES}
\ No newline at end of file
diff --git a/tests/extensions/test_name_moderation_cog.py b/tests/extensions/test_name_moderation_cog.py
new file mode 100644
index 00000000..01b0d048
--- /dev/null
+++ b/tests/extensions/test_name_moderation_cog.py
@@ -0,0 +1,75 @@
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from bot.extensions.name_moderation_cog import NameModerationCog
+
+
+@pytest.fixture
+def name_moderation_cog(mock_bot):
+    """Instantiate the NameModerationCog with a mock bot."""
+
+    mock_bot.get_channel_by_name.return_value = "Mod room"
+
+    return NameModerationCog(mock_bot)
+
+
+@pytest.fixture
+def mock_ctx():
+    """Create a mock command context."""
+    ctx = MagicMock()
+    ctx.defer = AsyncMock()
+    ctx.send = AsyncMock()
+    return ctx
+
+
+@pytest.mark.asyncio
+@patch("bot.extensions.name_moderation_cog.notice")
+@patch("bot.extensions.name_moderation_cog.make_random_name")
+async def test_name_moderation_on_member_join__with_none_blacklisted_name__expect_nothing(
+    mock_random, mock_notice, name_moderation_cog
+):
+    member = AsyncMock()
+    member.display_name = "Normal Name"
+
+    name_moderation_cog.bad_words = ["nothing"]
+    await name_moderation_cog.on_member_join(member)
+
+    mock_random.assert_not_called()
+    member.edit.assert_not_awaited()
+    member.send.assert_not_awaited()
+    mock_notice.assert_not_called()
+
+
+@pytest.mark.asyncio
+@patch("bot.extensions.name_moderation_cog.notice")
+@patch("bot.extensions.name_moderation_cog.make_random_name")
+async def test_name_moderation_on_member_join__with_blacklisted_name__expect_change_and_message(
+    mock_random, mock_notice, name_moderation_cog
+):
+    member = AsyncMock()
+    member.display_name = "Bad Name"
+
+    mock_log = MagicMock()
+    mock_notice.return_value = mock_log
+    mock_log.send = AsyncMock()
+
+    mock_random.return_value = "Good Name"
+
+    name_moderation_cog.bad_words = ["bad"]
+
+    await name_moderation_cog.on_member_join(member)
+
+    mock_random.assert_called_once()
+
+    member.edit.assert_awaited_once_with(nick="Good Name")
+    member.send.assert_awaited_once_with(
+        "Your name has an inappropriate word in it, thus it was changed from Bad Name to Good Name."
+    )
+
+    mock_notice.assert_called_once_with("NAME", "Username of Bad Name was changed.")
+    mock_log.add_field.assert_called_once_with(
+        "Reason: ",
+        "User Bad Name joined with an inappropriate name, thus it was changed to Good Name.",
+    )
+    mock_log.send.assert_awaited_once_with("Mod room")
diff --git a/tests/services/__init__.py b/tests/services/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/services/test_random_name_service.py b/tests/services/test_random_name_service.py
new file mode 100644
index 00000000..383e347b
--- /dev/null
+++ b/tests/services/test_random_name_service.py
@@ -0,0 +1,12 @@
+from unittest.mock import patch
+
+from bot.services.random_name_service import make_random_name
+
+
+@patch("random.choice")
+def test_random_name_service__expect_two_capitalized_words(mock_random):
+    mock_random.side_effect = ["good", "grace"]
+
+    assert make_random_name() == "Good Grace"
+
+    assert mock_random.call_count == 2