diff --git a/Source/cmGraphVizWriter.cxx b/Source/cmGraphVizWriter.cxx
index 570f4ea4b8..8a7728e767 100644
--- a/Source/cmGraphVizWriter.cxx
+++ b/Source/cmGraphVizWriter.cxx
@@ -2,6 +2,7 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmGraphVizWriter.h"
 
+#include <algorithm>
 #include <cctype>
 #include <iostream>
 #include <memory>
@@ -552,16 +553,23 @@ bool cmGraphVizWriter::TargetTypeEnabled(
 std::string cmGraphVizWriter::ItemNameWithAliases(
   std::string const& itemName) const
 {
-  auto nameWithAliases = itemName;
-
+  std::vector<std::string> items;
   for (auto const& lg : this->GlobalGenerator->GetLocalGenerators()) {
     for (auto const& aliasTargets : lg->GetMakefile()->GetAliasTargets()) {
       if (aliasTargets.second == itemName) {
-        nameWithAliases += "\\n(" + aliasTargets.first + ")";
+        items.push_back(aliasTargets.first);
       }
     }
   }
 
+  std::sort(items.begin(), items.end());
+  items.erase(std::unique(items.begin(), items.end()), items.end());
+
+  auto nameWithAliases = itemName;
+  for(auto const& item : items) {
+    nameWithAliases += "\\n(" + item + ")";
+  }
+
   return nameWithAliases;
 }
 
diff --git a/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake b/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake
index 4ce6b5c4b7..8a628cfced 100644
--- a/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake
+++ b/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake
@@ -64,3 +64,5 @@ target_link_libraries(ConsoleApplication CryptoCurrencyMiningLibrary)
 
 add_custom_target(GenerateManPage COMMAND ${CMAKE_COMMAND} --version)
 add_dependencies(ConsoleApplication GenerateManPage)
+
+add_subdirectory(sub_directory_target)
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot
index 31d88df668..a9e664ac8a 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot
@@ -52,4 +52,5 @@ subgraph clusterLegend {
     "node12" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node12" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node12" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node13" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot
index 26f2f64f13..06cdb756f5 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot
@@ -50,4 +50,5 @@ subgraph clusterLegend {
     "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node12" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot
index 26f2f64f13..06cdb756f5 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot
@@ -50,4 +50,5 @@ subgraph clusterLegend {
     "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node12" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot
index db675a8e51..490450ebc6 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot
@@ -46,4 +46,5 @@ subgraph clusterLegend {
     "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node9" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node10" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot
index 234ee39cad..086c849ce1 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot
@@ -35,4 +35,5 @@ subgraph clusterLegend {
     "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
     "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
     "node6" [ label = "\"-lm\"", shape = septagon ];
+    "node7" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot
index 6dea88c391..350f0f1567 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot
@@ -43,4 +43,5 @@ subgraph clusterLegend {
     "node8" -> "node1" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
     "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node9" -> "node1" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node10" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot
index df3d10ac3e..fd351d0ca2 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot
@@ -44,4 +44,5 @@ subgraph clusterLegend {
     "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
     "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
     "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node10" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot
index 8f832a8f5f..39a2a03386 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot
@@ -48,4 +48,5 @@ subgraph clusterLegend {
     "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node11" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot
index 26f2f64f13..06cdb756f5 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot
@@ -50,4 +50,5 @@ subgraph clusterLegend {
     "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node12" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot
index e127daab94..d949d87f91 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot
@@ -44,4 +44,5 @@ subgraph clusterLegend {
     "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node11" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_static_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_static_libs.dot
index 81199a245a..e9b9570d7c 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_static_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_static_libs.dot
@@ -39,4 +39,5 @@ subgraph clusterLegend {
     "node8" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
     "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node10" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot
index 4f242bb929..7db111c17d 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot
@@ -48,4 +48,5 @@ subgraph clusterLegend {
     "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node11" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot
index c664af8aec..f664c2e68c 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot
@@ -50,4 +50,5 @@ subgraph clusterLegend {
     "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node12" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot
index 557930620c..58dda6d213 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot
@@ -50,4 +50,5 @@ subgraph clusterLegend {
     "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node12" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot
index 3bf20eca68..8b93f7c728 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot
@@ -50,4 +50,5 @@ subgraph clusterLegend {
     "point11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
     "point11" -> "point0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
     "point11" -> "point2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "point12" [ label = "SubDirectoryTarget", shape = egg ];
 }
diff --git a/Tests/RunCMake/Graphviz/sub_directory_target/CMakeLists.txt b/Tests/RunCMake/Graphviz/sub_directory_target/CMakeLists.txt
new file mode 100644
index 0000000000..d84897b9aa
--- /dev/null
+++ b/Tests/RunCMake/Graphviz/sub_directory_target/CMakeLists.txt
@@ -0,0 +1 @@
+add_executable(SubDirectoryTarget test.c)
diff --git a/Tests/RunCMake/Graphviz/sub_directory_target/test.c b/Tests/RunCMake/Graphviz/sub_directory_target/test.c
new file mode 100644
index 0000000000..d123e0977a
--- /dev/null
+++ b/Tests/RunCMake/Graphviz/sub_directory_target/test.c
@@ -0,0 +1,4 @@
+int main(int argc, char** argv)
+{
+  return 0;
+}