diff --git a/src/libslic3r/PrintBase.cpp b/src/libslic3r/PrintBase.cpp
index 821cf8a7f8..4448c12c76 100644
--- a/src/libslic3r/PrintBase.cpp
+++ b/src/libslic3r/PrintBase.cpp
@@ -21,11 +21,12 @@ void PrintTryCancel::operator()()
 
 size_t PrintStateBase::g_last_timestamp = 0;
 
-// Update "scale", "input_filename", "input_filename_base" placeholders from the current m_objects.
+// Update "scale", "input_filename", "input_filename_base", "first_object_name" placeholders from the current m_objects.
 void PrintBase::update_object_placeholders(DynamicConfig &config, const std::string &default_ext) const
 {
     // get the first input file name
     std::string input_file;
+    std::string first_object_name;
     std::vector<std::string> v_scale;
     int num_objects = 0;
     int num_instances = 0;
@@ -38,6 +39,8 @@ void PrintBase::update_object_placeholders(DynamicConfig &config, const std::str
 			}
 		if (printable) {
             ++ num_objects;
+	        if (num_objects == 1)
+	            first_object_name = model_object->name;
 	        // CHECK_ME -> Is the following correct ?
 			v_scale.push_back("x:" + boost::lexical_cast<std::string>(printable->get_scaling_factor(X) * 100) +
 				"% y:" + boost::lexical_cast<std::string>(printable->get_scaling_factor(Y) * 100) +
@@ -51,6 +54,7 @@ void PrintBase::update_object_placeholders(DynamicConfig &config, const std::str
     config.set_key_value("num_instances", new ConfigOptionInt(num_instances));
 
     config.set_key_value("scale", new ConfigOptionStrings(v_scale));
+    config.set_key_value("first_object_name", new ConfigOptionString(first_object_name));
     if (! input_file.empty()) {
         // get basename with and without suffix
         const std::string input_filename = boost::filesystem::path(input_file).filename().string();
diff --git a/tests/fff_print/test_print.cpp b/tests/fff_print/test_print.cpp
index c86cfa71dd..0791d4f7f1 100644
--- a/tests/fff_print/test_print.cpp
+++ b/tests/fff_print/test_print.cpp
@@ -183,6 +183,74 @@ void trigger_precise_wall_warning(DynamicPrintConfig& c)
 
 } // namespace
 
+// ---------------------------------------------------------------------------
+// {first_object_name} filename placeholder
+// ---------------------------------------------------------------------------
+namespace {
+
+// Add a printable 20mm cube named `name` to `model`; returns it so the caller can tweak it.
+ModelObject* add_named_cube(Model& model, const std::string& name)
+{
+    ModelObject* obj = model.add_object();
+    obj->name = name;
+    obj->add_volume(make_cube(20.0, 20.0, 20.0));
+    obj->add_instance();
+    obj->ensure_on_bed();
+    return obj;
+}
+
+// Resolve `format` to an output file name for a print of `model`. `filename_base`, when set,
+// is the saved-project name passed to output_filename().
+std::string resolved_output_name(Model& model, const std::string& format, const std::string& filename_base = {})
+{
+    DynamicPrintConfig config = DynamicPrintConfig::full_print_config();
+    config.set_key_value("filename_format", new ConfigOptionString(format));
+
+    Print print;
+    for (ModelObject* obj : model.objects)
+        print.auto_assign_extruders(obj);
+    print.apply(model, config);
+    return print.output_filename(filename_base);
+}
+
+} // namespace
+
+TEST_CASE("Print: {first_object_name} names the first printable object on the plate", "[Print]")
+{
+    Model model;
+
+    SECTION("uses the object's name") {
+        add_named_cube(model, "WidgetPart");
+        CHECK(resolved_output_name(model, "{first_object_name}") == "WidgetPart.gcode");
+    }
+
+    SECTION("picks the first when several objects are printable") {
+        add_named_cube(model, "FirstPart");
+        add_named_cube(model, "SecondPart");
+        CHECK(resolved_output_name(model, "{first_object_name}") == "FirstPart.gcode");
+    }
+
+    SECTION("skips objects outside the print volume (e.g. on another plate)") {
+        // First in model order, but not on the current plate, so is_printable() is false.
+        add_named_cube(model, "OtherPlatePart")->instances.front()->print_volume_state = ModelInstancePVS_Fully_Outside;
+        add_named_cube(model, "OnPlatePart");
+        CHECK(resolved_output_name(model, "{first_object_name}") == "OnPlatePart.gcode");
+    }
+
+    SECTION("is empty when the object has no name") {
+        add_named_cube(model, "");
+        CHECK(resolved_output_name(model, "part_{first_object_name}") == "part_.gcode");
+    }
+}
+
+TEST_CASE("Print: {first_object_name} is not replaced by the saved-project file name", "[Print]")
+{
+    // Passing a saved-project file name as the filename_base must not change {first_object_name}.
+    Model model;
+    add_named_cube(model, "WidgetPart");
+    CHECK(resolved_output_name(model, "{first_object_name}", "SavedProject") == "WidgetPart.gcode");
+}
+
 TEST_CASE("Print::validate stacks independent warnings", "[Print][validate]")
 {
     // Two unrelated checks (region precise-wall + machine acceleration) must each