diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7146dc2fd..2b270d807 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
     * Made `Grav::redirect()` to accept `Route` class
 2. [](#improved)
    * Upgraded vendor libs for PHP 8.1 compatibility
+   * Added third `$name` parameter to `Blueprint::flattenData()` method, useful for flattening repeating data
 
 # v1.7.25
 ## 11/16/2021
diff --git a/system/src/Grav/Common/Data/Blueprint.php b/system/src/Grav/Common/Data/Blueprint.php
index 287819939..df434267f 100644
--- a/system/src/Grav/Common/Data/Blueprint.php
+++ b/system/src/Grav/Common/Data/Blueprint.php
@@ -293,15 +293,16 @@ class Blueprint extends BlueprintForm
     /**
      * Flatten data by using blueprints.
      *
-     * @param  array $data
-     * @param  bool $includeAll
+     * @param array $data       Data to be flattened.
+     * @param bool $includeAll  True if undefined properties should also be included.
+     * @param string $name      Property which will be flattened, useful for flattening repeating data.
      * @return array
      */
-    public function flattenData(array $data, bool $includeAll = false)
+    public function flattenData(array $data, bool $includeAll = false, string $name = '')
     {
         $this->initInternals();
 
-        return $this->blueprintSchema->flattenData($data, $includeAll);
+        return $this->blueprintSchema->flattenData($data, $includeAll, $name);
     }
 
 
diff --git a/system/src/Grav/Common/Data/BlueprintSchema.php b/system/src/Grav/Common/Data/BlueprintSchema.php
index db5e6af7d..c28ed7a8d 100644
--- a/system/src/Grav/Common/Data/BlueprintSchema.php
+++ b/system/src/Grav/Common/Data/BlueprintSchema.php
@@ -115,23 +115,29 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
     /**
      * Flatten data by using blueprints.
      *
-     * @param  array $data                  Data to be flattened.
-     * @param bool $includeAll
+     * @param array $data       Data to be flattened.
+     * @param bool $includeAll  True if undefined properties should also be included.
+     * @param string $name      Property which will be flattened, useful for flattening repeating data.
      * @return array
      */
-    public function flattenData(array $data, bool $includeAll = false)
+    public function flattenData(array $data, bool $includeAll = false, string $name = '')
     {
+        $prefix = $name !== '' ? $name . '.' : '';
+
         $list = [];
         if ($includeAll) {
-            foreach ($this->items as $key => $rules) {
+            $items = $name !== '' ? $this->getProperty($name)['fields'] ?? [] : $this->items;
+            foreach ($items as $key => $rules) {
                 $type = $rules['type'] ?? '';
                 if (!str_starts_with($type, '_') && !str_contains($key, '*')) {
-                    $list[$key] = null;
+                    $list[$prefix . $key] = null;
                 }
             }
         }
 
-        return array_replace($list, $this->flattenArray($data, $this->nested, ''));
+        $nested = $this->getNestedRules($name);
+
+        return array_replace($list, $this->flattenArray($data, $nested, $prefix));
     }
 
     /**