diff --git a/support/test/include/test.hpp b/support/test/include/test.hpp
index df9498e9..8d9b9cdf 100644
--- a/support/test/include/test.hpp
+++ b/support/test/include/test.hpp
@@ -19,8 +19,8 @@
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   SOFTWARE.
 */
-#ifndef REPERTORY_TEST_INCLUDE_TEST_HPP_
-#define REPERTORY_TEST_INCLUDE_TEST_HPP_
+#ifndef FIFTHGRID_TEST_INCLUDE_TEST_HPP_
+#define FIFTHGRID_TEST_INCLUDE_TEST_HPP_
 
 #if defined(U)
 #undef U
@@ -36,7 +36,7 @@ using namespace ::testing;
 
 #include "utils/all.hpp"
 
-namespace repertory::test {
+namespace fifthgrid::test {
 #if defined(PROJECT_ENABLE_LIBSODIUM)
 [[nodiscard]] auto
 create_random_file(std::size_t size) -> utils::file::i_file &;
@@ -58,6 +58,6 @@ auto generate_test_directory() -> utils::file::i_directory &;
 [[nodiscard]] auto get_test_input_dir() -> std::string;
 
 [[nodiscard]] auto get_test_output_dir() -> std::string;
-} // namespace repertory::test
+} // namespace fifthgrid::test
 
-#endif // REPERTORY_TEST_INCLUDE_TEST_HPP_
+#endif // FIFTHGRID_TEST_INCLUDE_TEST_HPP_
diff --git a/support/test/src/test.cpp b/support/test/src/test.cpp
index 42bcf44d..a7c4d182 100644
--- a/support/test/src/test.cpp
+++ b/support/test/src/test.cpp
@@ -24,15 +24,15 @@
 namespace {
 static std::recursive_mutex file_mtx{};
 
-static std::vector<std::unique_ptr<repertory::utils::file::i_fs_item>>
+static std::vector<std::unique_ptr<fifthgrid::utils::file::i_fs_item>>
     generated_files{};
 
 static void delete_generated_files() {
-  repertory::recur_mutex_lock lock{file_mtx};
+  fifthgrid::recur_mutex_lock lock{file_mtx};
   std::optional<std::string> parent_path;
   for (auto &&path : generated_files) {
     if (parent_path->empty()) {
-      parent_path = repertory::utils::path::get_parent_path(path->get_path());
+      parent_path = fifthgrid::utils::path::get_parent_path(path->get_path());
     }
 
     [[maybe_unused]] auto removed = path->remove();
@@ -41,7 +41,7 @@ static void delete_generated_files() {
 
   if (parent_path.has_value()) {
     EXPECT_TRUE(
-        repertory::utils::file::directory(*parent_path).remove_recursively());
+        fifthgrid::utils::file::directory(*parent_path).remove_recursively());
   }
 }
 
@@ -52,7 +52,7 @@ struct file_deleter final {
 static auto deleter{std::make_unique<file_deleter>()};
 } // namespace
 
-namespace repertory::test {
+namespace fifthgrid::test {
 #if defined(PROJECT_ENABLE_LIBSODIUM)
 auto create_random_file(std::size_t size) -> utils::file::i_file & {
   recur_mutex_lock lock{file_mtx};
@@ -134,4 +134,4 @@ auto get_test_output_dir() -> std::string {
 
   return test_path;
 }
-} // namespace repertory::test
+} // namespace fifthgrid::test
diff --git a/support/test/src/utils/collection_test.cpp b/support/test/src/utils/collection_test.cpp
index 39d85bb5..fcc0927d 100644
--- a/support/test/src/utils/collection_test.cpp
+++ b/support/test/src/utils/collection_test.cpp
@@ -21,7 +21,7 @@
 */
 #include "test.hpp"
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_collection, excludes) {
   auto data = {"cow", "moose", "dog", "chicken"};
   EXPECT_FALSE(utils::collection::excludes(data, "chicken"));
@@ -247,4 +247,4 @@ TEST(utils_collection, remove_element) {
     EXPECT_EQ(static_cast<std::uint8_t>(0xEE), col.at(1U));
   }
 }
-} // namespace repertory
+} // namespace fifthgrid
diff --git a/support/test/src/utils/common_test.cpp b/support/test/src/utils/common_test.cpp
index f07eabb3..451ae98c 100644
--- a/support/test/src/utils/common_test.cpp
+++ b/support/test/src/utils/common_test.cpp
@@ -21,7 +21,7 @@
 */
 #include "test.hpp"
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_common, calculate_read_size) {
   auto read_size = utils::calculate_read_size(0U, 0U, 0U);
   EXPECT_EQ(0U, read_size);
@@ -273,7 +273,7 @@ TEST(utils_common, get_environment_variable) {
   std::string path;
 
 #if defined(_WIN32)
-  path.resize(repertory::max_path_length + 1U);
+  path.resize(fifthgrid::max_path_length + 1U);
   auto size = ::GetEnvironmentVariableA(path_env.c_str(), path.data(), 0U);
 
   path.resize(size);
@@ -305,4 +305,4 @@ TEST(utils_common, get_next_available_port_fails_if_starting_point_is_zero) {
   EXPECT_EQ(0U, available_port);
 }
 #endif // defined(PROJECT_ENABLE_BOOST)
-} // namespace repertory
+} // namespace fifthgrid
diff --git a/support/test/src/utils/encrypting_reader_test.cpp b/support/test/src/utils/encrypting_reader_test.cpp
index 078dba8a..e1c4643e 100644
--- a/support/test/src/utils/encrypting_reader_test.cpp
+++ b/support/test/src/utils/encrypting_reader_test.cpp
@@ -23,7 +23,7 @@
 
 #if defined(PROJECT_ENABLE_LIBSODIUM) && defined(PROJECT_ENABLE_BOOST)
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_encrypting_reader, read_file_data) {
   const auto token = std::string("moose");
   auto &source_file = test::create_random_file(
@@ -220,6 +220,6 @@ TEST(utils_encrypting_reader, read_file_data_in_multiple_chunks_as_stream) {
     }
   }
 }
-} // namespace repertory
+} // namespace fifthgrid
 
 #endif // defined(PROJECT_ENABLE_LIBSODIUM) && defined(PROJECT_ENABLE_BOOST)
diff --git a/support/test/src/utils/encryption_test.cpp b/support/test/src/utils/encryption_test.cpp
index 6a0e1913..8a03815d 100644
--- a/support/test/src/utils/encryption_test.cpp
+++ b/support/test/src/utils/encryption_test.cpp
@@ -23,7 +23,7 @@
 
 #if defined(PROJECT_ENABLE_LIBSODIUM)
 
-namespace repertory {
+namespace fifthgrid {
 static constexpr const std::string_view token{"moose"};
 static constexpr const std::wstring_view token_w{L"moose"};
 
@@ -278,6 +278,6 @@ TEST(utils_encryption, decrypt_file_path) {
   }
 }
 #endif // defined(PROJECT_ENABLE_BOOST)
-} // namespace repertory
+} // namespace fifthgrid
 
 #endif // defined(PROJECT_ENABLE_LIBSODIUM)
diff --git a/support/test/src/utils/error_test.cpp b/support/test/src/utils/error_test.cpp
index ccb710cb..a31a26f6 100644
--- a/support/test/src/utils/error_test.cpp
+++ b/support/test/src/utils/error_test.cpp
@@ -21,7 +21,7 @@
 */
 #include "test.hpp"
 
-namespace repertory {
+namespace fifthgrid {
 template <typename T, typename U>
 constexpr bool is_decay_equ = std::is_same_v<std::decay_t<T>, U>;
 
@@ -63,4 +63,4 @@ TEST(utils_error, can_override_exception_handler) {
 
   utils::error::set_exception_handler(&utils::error::default_exception_handler);
 }
-} // namespace repertory
+} // namespace fifthgrid
diff --git a/support/test/src/utils/file_test.cpp b/support/test/src/utils/file_test.cpp
index 330898b6..159b9f65 100644
--- a/support/test/src/utils/file_test.cpp
+++ b/support/test/src/utils/file_test.cpp
@@ -25,7 +25,7 @@ namespace {
 static constexpr const auto file_type_count{1U};
 }
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_file, can_create_file) {
   for (auto idx = 0U; idx < file_type_count; ++idx) {
     auto path = test::generate_test_file_name("utils_file");
@@ -300,4 +300,4 @@ TEST(util_file, file_exists_in_path) {
         utils::string::from_utf8(test_dir.get_path()), L"moose.txt"));
   }
 }
-} // namespace repertory
+} // namespace fifthgrid
diff --git a/support/test/src/utils/hash_test.cpp b/support/test/src/utils/hash_test.cpp
index 13287bbd..c3f47d72 100644
--- a/support/test/src/utils/hash_test.cpp
+++ b/support/test/src/utils/hash_test.cpp
@@ -23,7 +23,7 @@
 
 #if defined(PROJECT_ENABLE_LIBSODIUM)
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_hash, hash_type_sizes) {
   EXPECT_EQ(32U, utils::encryption::hash_256_t{}.size());
   EXPECT_EQ(48U, utils::encryption::hash_384_t{}.size());
@@ -181,6 +181,6 @@ TEST(utils_hash, sha512) {
       "5ac3bcc80844b7d50b1cc6603444bbe7cfcf8fc0aa1ee3c636d9e339",
       hash.c_str());
 }
-} // namespace repertory
+} // namespace fifthgrid
 
 #endif // defined(PROJECT_ENABLE_LIBSODIUM)
diff --git a/support/test/src/utils/path_test.cpp b/support/test/src/utils/path_test.cpp
index fff28838..57a6b91f 100644
--- a/support/test/src/utils/path_test.cpp
+++ b/support/test/src/utils/path_test.cpp
@@ -25,27 +25,27 @@
 namespace {
 static const auto test_path = [](std::string str) -> std::string {
 #if defined(PROJECT_ENABLE_WIN32_LONG_PATH_NAMES)
-  if (repertory::utils::string::begins_with(str, "\\")) {
-    str = repertory::utils::string::to_lower(
+  if (fifthgrid::utils::string::begins_with(str, "\\")) {
+    str = fifthgrid::utils::string::to_lower(
               std::filesystem::current_path().string().substr(0U, 2U)) +
           str;
   }
 
-  str = std::string{repertory::utils::path::long_notation} + str;
+  str = std::string{fifthgrid::utils::path::long_notation} + str;
 #else  // !defined(PROJECT_ENABLE_WIN32_LONG_PATH_NAMES)
-  if (repertory::utils::string::begins_with(str, "\\")) {
-    str = repertory::utils::string::to_lower(
+  if (fifthgrid::utils::string::begins_with(str, "\\")) {
+    str = fifthgrid::utils::string::to_lower(
               std::filesystem::current_path().string().substr(0U, 2U)) +
           str;
   }
 #endif // defined(PROJECT_ENABLE_WIN32_LONG_PATH_NAMES)
 
-  return repertory::utils::string::right_trim(str, '\\');
+  return fifthgrid::utils::string::right_trim(str, '\\');
 };
 } // namespace
 #endif // defined(_WIN32)
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_path, constants) {
   EXPECT_EQ(std::string_view{"\\"}, utils::path::backslash);
   EXPECT_EQ(std::wstring_view{L"\\"}, utils::path::backslash_w);
@@ -400,7 +400,7 @@ TEST(utils_path, absolute_can_resolve_path_variables) {
   std::string home{};
 
 #if defined(_WIN32)
-  home.resize(repertory::max_path_length + 1U);
+  home.resize(fifthgrid::max_path_length + 1U);
   auto size = ::GetEnvironmentVariableA("USERPROFILE", home.data(), 0U);
 
   home.resize(size);
@@ -546,4 +546,4 @@ TEST(utils_path, does_not_contain_trash_directory) {
   }
 #endif // defined(_WIN32)
 }
-} // namespace repertory
+} // namespace fifthgrid
diff --git a/support/test/src/utils/string_test.cpp b/support/test/src/utils/string_test.cpp
index f25bc9d6..023dbe65 100644
--- a/support/test/src/utils/string_test.cpp
+++ b/support/test/src/utils/string_test.cpp
@@ -21,7 +21,7 @@
 */
 #include "test.hpp"
 
-namespace repertory {
+namespace fifthgrid {
 TEST(utils_string, begins_with) {
   std::string str{"moose"};
   EXPECT_TRUE(utils::string::begins_with(str, "m"));
@@ -134,4 +134,4 @@ TEST(utils_string, to_bool) {
   EXPECT_FALSE(utils::string::to_bool("0"));
   EXPECT_FALSE(utils::string::to_bool("00000.00000"));
 }
-} // namespace repertory
+} // namespace fifthgrid