diff --git a/scripts/system/create/entitySelectionTool/entitySelectionTool.js b/scripts/system/create/entitySelectionTool/entitySelectionTool.js
index 9bab739060..e224e28fca 100644
--- a/scripts/system/create/entitySelectionTool/entitySelectionTool.js
+++ b/scripts/system/create/entitySelectionTool/entitySelectionTool.js
@@ -6,6 +6,7 @@
 //    Modified by Daniela Fontes * @DanielaFifo and Tiago Andrade @TagoWill on 4/7/2017
 //    Modified by David Back on 1/9/2018
 //  Copyright 2014 High Fidelity, Inc.
+//  Copyright 2020 Vircadia contributors
 //
 //  This script implements a class useful for building tools for editing entities.
 //
@@ -31,6 +32,46 @@ function deepCopy(v) {
     return JSON.parse(JSON.stringify(v));
 }
 
+function getDuplicateAppendedName(name) {
+    var appendiceChar = "(0123456789)";
+    var currentChar = "";
+    var rippedName = name;
+    var existingSequence = 0;
+    var sequenceReader = "";
+    for (var i = name.length - 1; i >= 0; i--) {
+        currentChar = name.charAt(i);
+        if (i === (name.length - 1) && currentChar !== ")") {
+            rippedName = name;
+            break;
+        } else {
+            if (appendiceChar.indexOf(currentChar) === -1) {
+                rippedName = name;
+                break;
+            } else {
+                if (currentChar == "(" && i === name.length - 2) {
+                    rippedName = name;
+                    break;
+                } else {
+                    if (currentChar == "(") {
+                        rippedName = name.substr(0, i-1);
+                        existingSequence = parseInt(sequenceReader);
+                        break;
+                    } else {
+                        sequenceReader = currentChar + sequenceReader;
+                    }
+                }
+            }
+        }
+    }
+    if (existingSequence === 0) {
+        rippedName = rippedName.trim() + " (2)";
+    } else {
+        existingSequence++;
+        rippedName = rippedName.trim() + " (" + existingSequence + ")";
+    }
+    return rippedName.trim();
+}
+
 SelectionManager = (function() {
     var that = {};
 
@@ -289,6 +330,8 @@ SelectionManager = (function() {
                     properties.localRotation = properties.rotation;
                 }
 
+                properties.name = getDuplicateAppendedName(properties.name);
+
                 properties.localVelocity = Vec3.ZERO;
                 properties.localAngularVelocity = Vec3.ZERO;