diff --git a/codegen/projections/rails_json/lib/rails_json/types.rb b/codegen/projections/rails_json/lib/rails_json/types.rb
index ec7e25737..a6d8736ce 100644
--- a/codegen/projections/rails_json/lib/rails_json/types.rb
+++ b/codegen/projections/rails_json/lib/rails_json/types.rb
@@ -1984,7 +1984,7 @@ def to_h
 
       class Unknown < MyUnion
         def initialize(name:, value:)
-          super({name: name, value: value})
+          super({name: name || 'Unknown', value: value})
         end
 
         def to_h
@@ -2479,7 +2479,7 @@ def to_h
 
       class Unknown < PlayerAction
         def initialize(name:, value:)
-          super({name: name, value: value})
+          super({name: name || 'Unknown', value: value})
         end
 
         def to_h
@@ -3376,7 +3376,7 @@ def to_h
 
       class Unknown < UnionPayload
         def initialize(name:, value:)
-          super({name: name, value: value})
+          super({name: name || 'Unknown', value: value})
         end
 
         def to_h
@@ -3406,7 +3406,7 @@ def to_h
 
       class Unknown < UnionWithJsonName
         def initialize(name:, value:)
-          super({name: name, value: value})
+          super({name: name || 'Unknown', value: value})
         end
 
         def to_h
diff --git a/codegen/projections/white_label/lib/white_label/event_stream.rb b/codegen/projections/white_label/lib/white_label/event_stream.rb
index 9413d990b..6f58e12eb 100644
--- a/codegen/projections/white_label/lib/white_label/event_stream.rb
+++ b/codegen/projections/white_label/lib/white_label/event_stream.rb
@@ -93,7 +93,7 @@ def parse_event(type, message)
         when 'ServerErrorEvent'
           Types::Events::ServerErrorEvent.new(Parsers::EventStream::ServerErrorEvent.parse(message))
         else
-          Types::Events::Unknown.new(name: type || 'unknown', value: message)
+          Types::Events::Unknown.new(name: type, value: message)
         end
       end
 
@@ -103,8 +103,8 @@ def parse_exception_event(type, message)
           data = Parsers::EventStream::ServerErrorEvent.parse(message)
           Errors::ServerErrorEvent.new(data: data, error_code: 'WhiteLabel::Types::Events::ServerErrorEvent')
         else
-          data = Types::Events::Unknown.new(name: type || 'unknown', value: message)
-          Errors::ApiError.new(error_code: type || 'unknown', metadata: {data: data})
+          data = Types::Events::Unknown.new(name: type, value: message)
+          Errors::ApiError.new(error_code: type, metadata: {data: data})
         end
       end
 
diff --git a/codegen/projections/white_label/lib/white_label/types.rb b/codegen/projections/white_label/lib/white_label/types.rb
index 4f80dee5f..470680a87 100644
--- a/codegen/projections/white_label/lib/white_label/types.rb
+++ b/codegen/projections/white_label/lib/white_label/types.rb
@@ -468,7 +468,7 @@ def to_h
 
       class Unknown < Events
         def initialize(name:, value:)
-          super({name: name, value: value})
+          super({name: name || 'Unknown', value: value})
         end
 
         def to_h
@@ -1414,7 +1414,7 @@ def to_s
 
       class Unknown < Union
         def initialize(name:, value:)
-          super({name: name, value: value})
+          super({name: name || 'Unknown', value: value})
         end
 
         def to_h
diff --git a/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/EventStreamGenerator.java b/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/EventStreamGenerator.java
index 3ff48fbba..5f4b23a59 100644
--- a/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/EventStreamGenerator.java
+++ b/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/EventStreamGenerator.java
@@ -238,7 +238,7 @@ private void renderParseEventMethod(
                     }
                 })
                 .openBlock("else")
-                .write("$T::Unknown.new(name: type || 'unknown', value: message)",
+                .write("$T::Unknown.new(name: type, value: message)",
                         symbolProvider.toSymbol(eventStreamUnion))
                 .closeBlock("end")
                 .closeBlock("end");
@@ -267,9 +267,9 @@ private void renderParseExceptionMethod(
                     }
                 })
                 .openBlock("else")
-                .write("data = $T::Unknown.new(name: type || 'unknown', value: message)",
+                .write("data = $T::Unknown.new(name: type, value: message)",
                         symbolProvider.toSymbol(eventStreamUnion))
-                .write("Errors::ApiError.new(error_code: type || 'unknown', "
+                .write("Errors::ApiError.new(error_code: type, "
                         + "metadata: {data: data})")
                 .closeBlock("end")
                 .closeBlock("end");
diff --git a/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/types/UnionGenerator.java b/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/types/UnionGenerator.java
index 1f0c054d7..064ca6763 100644
--- a/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/types/UnionGenerator.java
+++ b/codegen/smithy-ruby-codegen/src/main/java/software/amazon/smithy/ruby/codegen/generators/types/UnionGenerator.java
@@ -72,7 +72,7 @@ public void render() {
             writer
                     .openBlock("class Unknown < $T", symbolProvider.toSymbol(shape))
                     .openBlock("def initialize(name:, value:)")
-                    .write("super({name: name, value: value})")
+                    .write("super({name: name || 'Unknown', value: value})")
                     .closeBlock("end")
                     .write("")
                     .openBlock("def to_h")
diff --git a/hearth/sig/lib/hearth/http/api_error.rbs b/hearth/sig/lib/hearth/http/api_error.rbs
deleted file mode 100644
index 895ea2556..000000000
--- a/hearth/sig/lib/hearth/http/api_error.rbs
+++ /dev/null
@@ -1,13 +0,0 @@
-module Hearth
-  module HTTP
-    class ApiError < Hearth::ApiError
-      def initialize: (http_resp: Response, error_code: String, ?metadata: Hash[Symbol, untyped], ?message: String?) -> void
-
-      attr_reader http_status: Integer
-
-      attr_reader http_fields: Fields
-
-      attr_reader http_body: IO
-    end
-  end
-end