diff --git a/gitplusplus.cpp b/gitplusplus.cpp
index fab4594..df44a69 100644
--- a/gitplusplus.cpp
+++ b/gitplusplus.cpp
@@ -21,6 +21,7 @@
 #include <QCheckBox>
 #include <QClipboard>
 #include <QComboBox>
+#include <QCompleter>
 #include <QDialog>
 #include <QDir>
 #include <QFile>
@@ -41,6 +42,7 @@
 #include <QPushButton>
 #include <QSortFilterProxyModel>
 #include <QSplitter>
+#include <QStringListModel>
 #include <QStatusBar>
 #include <QSettings>
 #include <QTabBar>
@@ -2484,6 +2486,39 @@ void GitPlusPlusView::createWorkspace()
     auto *destEdit = new QLineEdit(&dlg);
     destEdit->setPlaceholderText(QStringLiteral("workspace-name (also used as branch name)"));
 
+    // Branch auto-completion from source repos
+    auto *completer = new QCompleter(&dlg);
+    completer->setCaseSensitivity(Qt::CaseInsensitive);
+    completer->setFilterMode(Qt::MatchContains);
+    destEdit->setCompleter(completer);
+
+    auto updateCompleter = [sourceEdit, completer]() {
+        QStringList branches;
+        QDir src(sourceEdit->text().trimmed());
+        if (src.exists()) {
+            const auto entries = src.entryList(QDir::Dirs | QDir::NoDotAndDotDot);
+            for (const auto &entry : entries) {
+                QString repoPath = src.absoluteFilePath(entry);
+                if (QFileInfo::exists(repoPath + QStringLiteral("/.git"))) {
+                    QByteArray out = GitProcess::run(repoPath,
+                        {QStringLiteral("for-each-ref"), QStringLiteral("--format=%(refname:short)"), QStringLiteral("refs/heads/")});
+                    const auto lines = QString::fromUtf8(out).split(QLatin1Char('\n'), Qt::SkipEmptyParts);
+                    for (const auto &line : lines) {
+                        QString b = line.trimmed();
+                        if (!b.isEmpty() && !branches.contains(b))
+                            branches.append(b);
+                    }
+                }
+            }
+        }
+        branches.sort();
+        completer->setModel(new QStringListModel(branches, completer));
+    };
+
+    // Populate on dialog open and when source changes
+    updateCompleter();
+    connect(sourceEdit, &QLineEdit::editingFinished, &dlg, updateCompleter);
+
     auto *destRow = new QHBoxLayout;
     destRow->addWidget(destLabel);
     destRow->addWidget(destEdit, 1);