diff --git a/javascript/sentry-conventions/src/attributes.ts b/javascript/sentry-conventions/src/attributes.ts
index 379ef9c7..df210271 100644
--- a/javascript/sentry-conventions/src/attributes.ts
+++ b/javascript/sentry-conventions/src/attributes.ts
@@ -12421,6 +12421,27 @@ export const SENTRY_SEGMENT_NAME = 'sentry.segment.name';
  */
 export type SENTRY_SEGMENT_NAME_TYPE = string;
 
+// Path: model/attributes/sentry/sentry__segment__name__source.json
+
+/**
+ * The name source of the segment span. Should only be set on segment spans. Known values are:  `'custom'`, `'url'`, `'route'`, `'component'`, `'view'`, `'task'`. `sentry.segment.name.source`
+ *
+ * Attribute Value Type: `string` {@link SENTRY_SEGMENT_NAME_SOURCE_TYPE}
+ *
+ * Apply Scrubbing: manual
+ *
+ * Attribute defined in OTEL: No
+ * Visibility: internal
+ *
+ * @example "'route'"
+ */
+export const SENTRY_SEGMENT_NAME_SOURCE = 'sentry.segment.name.source';
+
+/**
+ * Type for {@link SENTRY_SEGMENT_NAME_SOURCE} sentry.segment.name.source
+ */
+export type SENTRY_SEGMENT_NAME_SOURCE_TYPE = string;
+
 // Path: model/attributes/sentry/sentry__server_sample_rate.json
 
 /**
@@ -15407,6 +15428,7 @@ export const ATTRIBUTE_TYPE: Record<string, AttributeType> = {
   'sentry.segment.id': 'string',
   'sentry.segment_id': 'string',
   'sentry.segment.name': 'string',
+  'sentry.segment.name.source': 'string',
   'sentry.server_sample_rate': 'double',
   'sentry.source': 'string',
   'sentry.span.source': 'string',
@@ -16082,6 +16104,7 @@ export type AttributeName =
   | typeof SENTRY_SEGMENT_ID
   | typeof _SENTRY_SEGMENT_ID
   | typeof SENTRY_SEGMENT_NAME
+  | typeof SENTRY_SEGMENT_NAME_SOURCE
   | typeof SENTRY_SERVER_SAMPLE_RATE
   | typeof SENTRY_SOURCE
   | typeof SENTRY_SPAN_SOURCE
@@ -23767,6 +23790,18 @@ export const ATTRIBUTE_METADATA: Record<AttributeName, AttributeMetadata> = {
       { version: '0.1.0', prs: [104] },
     ],
   },
+  'sentry.segment.name.source': {
+    brief:
+      "The name source of the segment span. Should only be set on segment spans. Known values are:  `'custom'`, `'url'`, `'route'`, `'component'`, `'view'`, `'task'`.",
+    type: 'string',
+    applyScrubbing: {
+      key: 'manual',
+    },
+    isInOtel: false,
+    visibility: 'internal',
+    example: "'route'",
+    changelog: [{ version: 'next', prs: [466], description: 'Added sentry.segment.name.source' }],
+  },
   'sentry.server_sample_rate': {
     brief: 'Rate at which a span was sampled in Relay.',
     type: 'double',
@@ -25664,6 +25699,7 @@ export type Attributes = {
   [SENTRY_SEGMENT_ID]?: SENTRY_SEGMENT_ID_TYPE;
   [_SENTRY_SEGMENT_ID]?: _SENTRY_SEGMENT_ID_TYPE;
   [SENTRY_SEGMENT_NAME]?: SENTRY_SEGMENT_NAME_TYPE;
+  [SENTRY_SEGMENT_NAME_SOURCE]?: SENTRY_SEGMENT_NAME_SOURCE_TYPE;
   [SENTRY_SERVER_SAMPLE_RATE]?: SENTRY_SERVER_SAMPLE_RATE_TYPE;
   [SENTRY_SOURCE]?: SENTRY_SOURCE_TYPE;
   [SENTRY_SPAN_SOURCE]?: SENTRY_SPAN_SOURCE_TYPE;
diff --git a/model/attributes/sentry/sentry__segment__name__source.json b/model/attributes/sentry/sentry__segment__name__source.json
new file mode 100644
index 00000000..fb81bc5f
--- /dev/null
+++ b/model/attributes/sentry/sentry__segment__name__source.json
@@ -0,0 +1,18 @@
+{
+  "key": "sentry.segment.name.source",
+  "brief": "The name source of the segment span. Should only be set on segment spans. Known values are:  `'custom'`, `'url'`, `'route'`, `'component'`, `'view'`, `'task'`.",
+  "type": "string",
+  "apply_scrubbing": {
+    "key": "manual"
+  },
+  "is_in_otel": false,
+  "visibility": "internal",
+  "example": "'route'",
+  "changelog": [
+    {
+      "version": "next",
+      "prs": [466],
+      "description": "Added sentry.segment.name.source"
+    }
+  ]
+}
diff --git a/python/src/sentry_conventions/attributes.py b/python/src/sentry_conventions/attributes.py
index 67e6cb4b..3e874e4a 100644
--- a/python/src/sentry_conventions/attributes.py
+++ b/python/src/sentry_conventions/attributes.py
@@ -7233,6 +7233,19 @@ class ATTRIBUTE_NAMES(metaclass=_AttributeNamesMeta):
     Example: "GET /user"
     """
 
+    # Path: model/attributes/sentry/sentry__segment__name__source.json
+    SENTRY_SEGMENT_NAME_SOURCE: Literal["sentry.segment.name.source"] = (
+        "sentry.segment.name.source"
+    )
+    """The name source of the segment span. Should only be set on segment spans. Known values are:  `'custom'`, `'url'`, `'route'`, `'component'`, `'view'`, `'task'`.
+
+    Type: str
+    Apply Scrubbing: manual
+    Defined in OTEL: No
+    Visibility: internal
+    Example: "'route'"
+    """
+
     # Path: model/attributes/sentry/sentry__segment_id.json
     _SENTRY_SEGMENT_ID: Literal["sentry.segment_id"] = "sentry.segment_id"
     """The segment ID of a span
@@ -16617,6 +16630,21 @@ class ATTRIBUTE_NAMES(metaclass=_AttributeNamesMeta):
             ChangelogEntry(version="0.1.0", prs=[104]),
         ],
     ),
+    "sentry.segment.name.source": AttributeMetadata(
+        brief="The name source of the segment span. Should only be set on segment spans. Known values are:  `'custom'`, `'url'`, `'route'`, `'component'`, `'view'`, `'task'`.",
+        type=AttributeType.STRING,
+        apply_scrubbing=ApplyScrubbingInfo(key=ApplyScrubbing.MANUAL),
+        is_in_otel=False,
+        visibility=Visibility.INTERNAL,
+        example="'route'",
+        changelog=[
+            ChangelogEntry(
+                version="next",
+                prs=[466],
+                description="Added sentry.segment.name.source",
+            ),
+        ],
+    ),
     "sentry.segment_id": AttributeMetadata(
         brief="The segment ID of a span",
         type=AttributeType.STRING,
@@ -18576,6 +18604,7 @@ class ATTRIBUTE_NAMES(metaclass=_AttributeNamesMeta):
         "sentry.sdk.version": str,
         "sentry.segment.id": str,
         "sentry.segment.name": str,
+        "sentry.segment.name.source": str,
         "sentry.segment_id": str,
         "sentry.server_sample_rate": float,
         "sentry.source": str,