diff --git a/api/src/main/java/marquez/common/models/NamespaceName.java b/api/src/main/java/marquez/common/models/NamespaceName.java
index 95896321bc..538572cf1d 100644
--- a/api/src/main/java/marquez/common/models/NamespaceName.java
+++ b/api/src/main/java/marquez/common/models/NamespaceName.java
@@ -24,7 +24,7 @@ public final class NamespaceName {
   private static final int MIN_SIZE = 1;
   private static final int MAX_SIZE = 1024;
   private static final Pattern PATTERN =
-      Pattern.compile(String.format("^[a-zA-Z:;=/0-9_\\-\\.@+]{%d,%d}$", MIN_SIZE, MAX_SIZE));
+      Pattern.compile(String.format("^[a-zA-Z:;=/0-9_\\-\\.@+,]{%d,%d}$", MIN_SIZE, MAX_SIZE));
 
   @Getter private final String value;
 
@@ -32,8 +32,8 @@ public NamespaceName(@NonNull final String value) {
     checkArgument(
         PATTERN.matcher(value).matches(),
         "namespace '%s' must contain only letters (a-z, A-Z), numbers (0-9), "
-            + "underscores (_), at (@), plus (+), dashes (-), colons (:), equals (=), semicolons (;), slashes (/) "
-            + "or dots (.) with a maximum length of %s characters.",
+            + "underscores (_), at (@), plus (+), dashes (-), colons (:), equals (=), semicolons (;), slashes (/), "
+            + "commas (,) or dots (.) with a maximum length of %s characters.",
         value,
         MAX_SIZE);
     this.value = value;
diff --git a/api/src/test/java/marquez/common/models/NamespaceNameTest.java b/api/src/test/java/marquez/common/models/NamespaceNameTest.java
index 5ceac8e92b..7baad0667d 100644
--- a/api/src/test/java/marquez/common/models/NamespaceNameTest.java
+++ b/api/src/test/java/marquez/common/models/NamespaceNameTest.java
@@ -25,7 +25,10 @@ public class NamespaceNameTest {
         "\u003D",
         "@",
         "abfss://something@.something-else.core.windows.net",
-        "databricks+connector://asdf-123456-7890.cloud.databricks.com"
+        "databricks+connector://asdf-123456-7890.cloud.databricks.com",
+        "sqlserver://synapse-test-test001.sql.azuresynapse.net;databaseName=TESTPOOL1,SCHEMA1",
+        "my,namespace",
+        ","
       })
   void testValidNamespaceName(String name) {
     assertThat(NamespaceName.of(name).getValue()).isEqualTo(name);