diff --git a/Src/Notion.Client/Api/Blocks/RequestParams/BlocksUpdateParameters/UpdateBlocks/HeadingThreeeUpdateBlock.cs b/Src/Notion.Client/Api/Blocks/RequestParams/BlocksUpdateParameters/UpdateBlocks/HeadingThreeeUpdateBlock.cs
index 353d1a98..d2eb4861 100644
--- a/Src/Notion.Client/Api/Blocks/RequestParams/BlocksUpdateParameters/UpdateBlocks/HeadingThreeeUpdateBlock.cs
+++ b/Src/Notion.Client/Api/Blocks/RequestParams/BlocksUpdateParameters/UpdateBlocks/HeadingThreeeUpdateBlock.cs
@@ -4,7 +4,7 @@
 
 namespace Notion.Client
 {
-    public class HeadingThreeeUpdateBlock : UpdateBlock
+    public class HeadingThreeUpdateBlock : UpdateBlock
     {
         [JsonProperty("heading_3")]
         [SuppressMessage("ReSharper", "InconsistentNaming")]
diff --git a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesCreateParameters/PropertySchema/RelationPropertySchema.cs b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesCreateParameters/PropertySchema/RelationPropertySchema.cs
index bee17690..fa6a3249 100644
--- a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesCreateParameters/PropertySchema/RelationPropertySchema.cs
+++ b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesCreateParameters/PropertySchema/RelationPropertySchema.cs
@@ -14,10 +14,10 @@ public class RelationInfo
             public Guid DatabaseId { get; set; }
 
             [JsonProperty("synced_property_id")]
-            public string SynchedPropertyId { get; set; }
+            public string SyncedPropertyId { get; set; }
 
             [JsonProperty("synced_property_name")]
-            public string SynchedPropertyName { get; set; }
+            public string SyncedPropertyName { get; set; }
         }
     }
 }
diff --git a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesUpdateParameters/PropertySchema/RelationUpdatePropertySchema.cs b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesUpdateParameters/PropertySchema/RelationUpdatePropertySchema.cs
index 1565cd4a..4f6a74a3 100644
--- a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesUpdateParameters/PropertySchema/RelationUpdatePropertySchema.cs
+++ b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesUpdateParameters/PropertySchema/RelationUpdatePropertySchema.cs
@@ -14,10 +14,10 @@ public class RelationInfo
             public Guid DatabaseId { get; set; }
 
             [JsonProperty("synced_property_id")]
-            public string SynchedPropertyId { get; set; }
+            public string SyncedPropertyId { get; set; }
 
             [JsonProperty("synced_property_name")]
-            public string SynchedPropertyName { get; set; }
+            public string SyncedPropertyName { get; set; }
         }
     }
 }
diff --git a/Src/Notion.Client/Models/Blocks/HeadingThreeeBlock.cs b/Src/Notion.Client/Models/Blocks/HeadingThreeeBlock.cs
index c6abc213..deada7de 100644
--- a/Src/Notion.Client/Models/Blocks/HeadingThreeeBlock.cs
+++ b/Src/Notion.Client/Models/Blocks/HeadingThreeeBlock.cs
@@ -5,7 +5,7 @@
 
 namespace Notion.Client
 {
-    public class HeadingThreeeBlock : Block, IColumnChildrenBlock, INonColumnBlock
+    public class HeadingThreeBlock : Block, IColumnChildrenBlock, INonColumnBlock
     {
         [JsonProperty("heading_3")]
         [SuppressMessage("ReSharper", "InconsistentNaming")]
diff --git a/Src/Notion.Client/Models/Blocks/IBlock.cs b/Src/Notion.Client/Models/Blocks/IBlock.cs
index fcf5364d..df625cf6 100644
--- a/Src/Notion.Client/Models/Blocks/IBlock.cs
+++ b/Src/Notion.Client/Models/Blocks/IBlock.cs
@@ -21,7 +21,7 @@ namespace Notion.Client
     [JsonSubtypes.KnownSubTypeAttribute(typeof(FileBlock), BlockType.File)]
     [JsonSubtypes.KnownSubTypeAttribute(typeof(HeadingOneBlock), BlockType.Heading_1)]
     [JsonSubtypes.KnownSubTypeAttribute(typeof(HeadingTwoBlock), BlockType.Heading_2)]
-    [JsonSubtypes.KnownSubTypeAttribute(typeof(HeadingThreeeBlock), BlockType.Heading_3)]
+    [JsonSubtypes.KnownSubTypeAttribute(typeof(HeadingThreeBlock), BlockType.Heading_3)]
     [JsonSubtypes.KnownSubTypeAttribute(typeof(ImageBlock), BlockType.Image)]
     [JsonSubtypes.KnownSubTypeAttribute(typeof(LinkPreviewBlock), BlockType.LinkPreview)]
     [JsonSubtypes.KnownSubTypeAttribute(typeof(LinkToPageBlock), BlockType.LinkToPage)]
diff --git a/Src/Notion.Client/Models/Blocks/IColumnChildrenBlock.cs b/Src/Notion.Client/Models/Blocks/IColumnChildrenBlock.cs
index 8c1e1446..769487c8 100644
--- a/Src/Notion.Client/Models/Blocks/IColumnChildrenBlock.cs
+++ b/Src/Notion.Client/Models/Blocks/IColumnChildrenBlock.cs
@@ -1,6 +1,6 @@
 namespace Notion.Client
 {
-    public interface ITemplateChildrendBlock : IBlock
+    public interface ITemplateChildrenBlock : IBlock
     {
     }
 
@@ -8,7 +8,7 @@ public interface ISyncedBlockChildren : IBlock
     {
     }
 
-    public interface IColumnChildrenBlock : ITemplateChildrendBlock, ISyncedBlockChildren
+    public interface IColumnChildrenBlock : ITemplateChildrenBlock, ISyncedBlockChildren
     {
     }
 
diff --git a/Src/Notion.Client/Models/Blocks/TemplateBlock.cs b/Src/Notion.Client/Models/Blocks/TemplateBlock.cs
index 705eaac3..867e7c85 100644
--- a/Src/Notion.Client/Models/Blocks/TemplateBlock.cs
+++ b/Src/Notion.Client/Models/Blocks/TemplateBlock.cs
@@ -16,7 +16,7 @@ public class Data
             public IEnumerable<RichTextBase> RichText { get; set; }
 
             [JsonProperty("children")]
-            public IEnumerable<ITemplateChildrendBlock> Children { get; set; }
+            public IEnumerable<ITemplateChildrenBlock> Children { get; set; }
         }
     }
 }
diff --git a/Test/Notion.IntegrationTests/IBlocksClientTests.cs b/Test/Notion.IntegrationTests/IBlocksClientTests.cs
index 34459f01..51e32072 100644
--- a/Test/Notion.IntegrationTests/IBlocksClientTests.cs
+++ b/Test/Notion.IntegrationTests/IBlocksClientTests.cs
@@ -370,7 +370,7 @@ private static IEnumerable<object[]> BlockData()
                         {
                             new RichTextText { Text = new Text { Content = "Test Template" } }
                         },
-                        Children = new List<ITemplateChildrendBlock>
+                        Children = new List<ITemplateChildrenBlock>
                         {
                             new EmbedBlock
                             {