diff --git a/src/plugins/projectexplorer/kit.cpp b/src/plugins/projectexplorer/kit.cpp
index 6b9f1d75fab..d29feab66ca 100644
--- a/src/plugins/projectexplorer/kit.cpp
+++ b/src/plugins/projectexplorer/kit.cpp
@@ -38,6 +38,7 @@
 #include <utils/macroexpander.h>
 #include <utils/optional.h>
 #include <utils/qtcassert.h>
+#include <utils/stringutils.h>
 
 #include <QApplication>
 #include <QFileInfo>
@@ -202,8 +203,7 @@ Kit *Kit::clone(bool keepName) const
     if (keepName)
         k->d->m_unexpandedDisplayName = d->m_unexpandedDisplayName;
     else
-        k->d->m_unexpandedDisplayName = QCoreApplication::translate("ProjectExplorer::Kit", "Clone of %1")
-                .arg(d->m_unexpandedDisplayName);
+        k->d->m_unexpandedDisplayName = newKitName(KitManager::kits());
     k->d->m_autodetected = false;
     k->d->m_data = d->m_data;
     // Do not clone m_fileSystemFriendlyName, needs to be unique
@@ -674,6 +674,19 @@ MacroExpander *Kit::macroExpander() const
     return &d->m_macroExpander;
 }
 
+QString Kit::newKitName(const QList<Kit *> &allKits) const
+{
+    return newKitName(unexpandedDisplayName(), allKits);
+}
+
+QString Kit::newKitName(const QString &name, const QList<Kit *> &allKits)
+{
+    const QString baseName = name.isEmpty()
+            ? QCoreApplication::translate("ProjectExplorer::Kit", "Unnamed")
+            : QCoreApplication::translate("ProjectExplorer::Kit", "Clone of %1").arg(name);
+    return Utils::makeUniquelyNumbered(baseName, transform(allKits, &Kit::unexpandedDisplayName));
+}
+
 void Kit::kitUpdated()
 {
     if (d->m_nestedBlockingLevel > 0) {
diff --git a/src/plugins/projectexplorer/kit.h b/src/plugins/projectexplorer/kit.h
index 81d734c71b9..b500b130860 100644
--- a/src/plugins/projectexplorer/kit.h
+++ b/src/plugins/projectexplorer/kit.h
@@ -137,6 +137,9 @@ public:
     bool hasFeatures(const QSet<Core::Id> &features) const;
     Utils::MacroExpander *macroExpander() const;
 
+    QString newKitName(const QList<Kit *> &allKits) const;
+    static QString newKitName(const QString &name, const QList<Kit *> &allKits);
+
 private:
     void setSdkProvided(bool sdkProvided);
 
diff --git a/src/plugins/projectexplorer/kitmodel.cpp b/src/plugins/projectexplorer/kitmodel.cpp
index 5e9f1ad561c..35285bf0878 100644
--- a/src/plugins/projectexplorer/kitmodel.cpp
+++ b/src/plugins/projectexplorer/kitmodel.cpp
@@ -247,6 +247,7 @@ void KitModel::markForRemoval(Kit *k)
 
 Kit *KitModel::markForAddition(Kit *baseKit)
 {
+    const QString newName = newKitName(baseKit ? baseKit->unexpandedDisplayName() : QString());
     KitNode *node = createNode(nullptr);
     m_manualRoot->appendChild(node);
     Kit *k = node->widget->workingCopy();
@@ -255,10 +256,10 @@ Kit *KitModel::markForAddition(Kit *baseKit)
         k->copyFrom(baseKit);
         k->setAutoDetected(false); // Make sure we have a manual kit!
         k->setSdkProvided(false);
-        k->setUnexpandedDisplayName(tr("Clone of %1").arg(k->unexpandedDisplayName()));
     } else {
         k->setup();
     }
+    k->setUnexpandedDisplayName(newName);
 
     if (!m_defaultNode)
         setDefaultNode(node);
@@ -273,6 +274,15 @@ void KitModel::updateVisibility()
     });
 }
 
+QString KitModel::newKitName(const QString &sourceName) const
+{
+    QList<Kit *> allKits;
+    forItemsAtLevel<2>([&allKits](const TreeItem *ti) {
+        allKits << static_cast<const KitNode *>(ti)->widget->workingCopy();
+    });
+    return Kit::newKitName(sourceName, allKits);
+}
+
 KitNode *KitModel::findWorkingCopy(Kit *k) const
 {
     return findItemAtLevel<2>([k](KitNode *n) { return n->widget->workingCopy() == k; });
diff --git a/src/plugins/projectexplorer/kitmodel.h b/src/plugins/projectexplorer/kitmodel.h
index c752215d419..f4e3d25f25c 100644
--- a/src/plugins/projectexplorer/kitmodel.h
+++ b/src/plugins/projectexplorer/kitmodel.h
@@ -71,6 +71,8 @@ public:
 
     void updateVisibility();
 
+    QString newKitName(const QString &sourceName) const;
+
 signals:
     void kitStateChanged();