diff --git a/docs/pkg/py/Brand.qmd b/docs/pkg/py/Brand.qmd
index ace75984..8346ab44 100644
--- a/docs/pkg/py/Brand.qmd
+++ b/docs/pkg/py/Brand.qmd
@@ -65,7 +65,7 @@ path
 
 | Name | Description |
 | --- | --- |
-| [from_yaml](#brand_yml.Brand.from_yaml) | Read a Brand YAML file. |
+| [from_yaml](#brand_yml.Brand.from_yaml) | Create a Brand instance from a Brand YAML file. |
 | [from_yaml_str](#brand_yml.Brand.from_yaml_str) | Create a Brand instance from a string of YAML. |
 | [model_dump_yaml](#brand_yml.Brand.model_dump_yaml) | Serialize the Brand object to YAML. |
 
@@ -75,19 +75,19 @@ path
 Brand.from_yaml(path)
 ```
 
-Read a Brand YAML file.
+Create a Brand instance from a Brand YAML file.
 
-Reads a Brand YAML file or finds and reads a `_brand.yml` file and returns
-a validated :class:`Brand` instance.
+Reads a Brand YAML file or finds and reads a `_brand.yml` file and
+returns a validated :class:`Brand` instance.
 
-To find a project-specific `_brand.yaml` file, pass `path` the project
+To find a project-specific `_brand.yml` file, pass `path` the project
 directory or `__file__` (the path of the current Python script).
 [`brand_yml.Brand.from_yaml`](`brand_yml.Brand.from_yaml`) will look in
 that directory or any parent directory for a `_brand.yml`,
-`brand/_brand.yml` or `_brand/_brand.yml` file. Note that it starts the
-search in the directory passed in and moves upward to find the
-`_brand.yml` file; it does not search into subdirectories of the current
-directory.
+`brand/_brand.yml` or `_brand/_brand.yml` file (or the same variants
+with a `.yaml` extension). Note that it starts the search in the
+directory passed in and moves upward to find the `_brand.yml` file; it
+does not search into subdirectories of the current directory.
 
 #### Parameters {.doc-section .doc-section-parameters}
 
@@ -95,8 +95,8 @@ directory.
 
 :   The path to the brand.yml file or a directory where `_brand.yml` is
     expected to be found. Typically, you can pass `__file__` from the
-    calling script to find `_brand.yml` in the current directory or any of
-    its parent directories.
+    calling script to find `_brand.yml` or `_brand.yaml` in the current
+    directory or any of its parent directories.
 
 #### Returns {.doc-section .doc-section-returns}
 
diff --git a/docs/pkg/py/utilities.qmd b/docs/pkg/py/utilities.qmd
index a8bcc42a..1d5b92de 100644
--- a/docs/pkg/py/utilities.qmd
+++ b/docs/pkg/py/utilities.qmd
@@ -16,8 +16,11 @@ parent directory. In each directory, `find_project_brand_yml()` looks for
 any of the following files in the given order:
 
 * `_brand.yml`
+* `_brand.yaml`
 * `brand/_brand.yml`
+* `brand/_brand.yaml`
 * `_brand/_brand.yml`
+* `_brand/_brand.yaml`
 
 ## Parameters {.doc-section .doc-section-parameters}
 
diff --git a/pkg-py/src/brand_yml/__init__.py b/pkg-py/src/brand_yml/__init__.py
index 12bc3842..9128d2fb 100644
--- a/pkg-py/src/brand_yml/__init__.py
+++ b/pkg-py/src/brand_yml/__init__.py
@@ -75,27 +75,27 @@ class Brand(BrandBase):
     @classmethod
     def from_yaml(cls, path: str | Path):
         """
-        Read a Brand YAML file.
+        Create a Brand instance from a Brand YAML file.
 
-        Reads a Brand YAML file or finds and reads a `_brand.yml` file and returns
-        a validated :class:`Brand` instance.
+        Reads a Brand YAML file or finds and reads a `_brand.yml` file and
+        returns a validated :class:`Brand` instance.
 
-        To find a project-specific `_brand.yaml` file, pass `path` the project
+        To find a project-specific `_brand.yml` file, pass `path` the project
         directory or `__file__` (the path of the current Python script).
         [`brand_yml.Brand.from_yaml`](`brand_yml.Brand.from_yaml`) will look in
         that directory or any parent directory for a `_brand.yml`,
-        `brand/_brand.yml` or `_brand/_brand.yml` file. Note that it starts the
-        search in the directory passed in and moves upward to find the
-        `_brand.yml` file; it does not search into subdirectories of the current
-        directory.
+        `brand/_brand.yml` or `_brand/_brand.yml` file (or the same variants
+        with a `.yaml` extension). Note that it starts the search in the
+        directory passed in and moves upward to find the `_brand.yml` file; it
+        does not search into subdirectories of the current directory.
 
         Parameters
         ----------
         path
             The path to the brand.yml file or a directory where `_brand.yml` is
             expected to be found. Typically, you can pass `__file__` from the
-            calling script to find `_brand.yml` in the current directory or any of
-            its parent directories.
+            calling script to find `_brand.yml` or `_brand.yaml` in the current
+            directory or any of its parent directories.
 
         Returns
         -------
diff --git a/pkg-py/src/brand_yml/_utils.py b/pkg-py/src/brand_yml/_utils.py
index 017638c9..bb0ebdaa 100644
--- a/pkg-py/src/brand_yml/_utils.py
+++ b/pkg-py/src/brand_yml/_utils.py
@@ -9,7 +9,7 @@
 
 
 def find_project_file(
-    filename: str,
+    filename: tuple[str, ...] | str,
     dir_: Path,
     subdir: tuple[str, ...] = (),
 ) -> Path:
@@ -17,12 +17,17 @@ def find_project_file(
     i = 0
     max_parents = 20
 
+    if isinstance(filename, str):
+        filename = tuple([filename])
+
     while dir_ != dir_.parent and i < max_parents:
-        if (dir_ / filename).exists():
-            return dir_ / filename
+        for fname in filename:
+            if (dir_ / fname).exists():
+                return dir_ / fname
         for sub in subdir:
-            if (dir_ / sub / filename).exists():
-                return dir_ / sub / filename
+            for fname in filename:
+                if (dir_ / sub / fname).exists():
+                    return dir_ / sub / fname
         dir_ = dir_.parent
         i += 1
 
@@ -41,8 +46,11 @@ def find_project_brand_yml(path: Path | str) -> Path:
     any of the following files in the given order:
 
     * `_brand.yml`
+    * `_brand.yaml`
     * `brand/_brand.yml`
+    * `brand/_brand.yaml`
     * `_brand/_brand.yml`
+    * `_brand/_brand.yaml`
 
     Parameters
     ----------
@@ -66,7 +74,11 @@ def find_project_brand_yml(path: Path | str) -> Path:
     if path.is_file():
         path = path.parent
 
-    return find_project_file("_brand.yml", path, ("brand", "_brand"))
+    return find_project_file(
+        filename=("_brand.yml", "_brand.yaml"),
+        dir_=path,
+        subdir=("brand", "_brand"),
+    )
 
 
 PredicateFuncType = Callable[[Any], bool]