diff --git a/src/lib/util/kuser.h b/src/lib/util/kuser.h
--- a/src/lib/util/kuser.h
+++ b/src/lib/util/kuser.h
@@ -399,6 +399,17 @@
      */
     ~KUser();
 
+    /**
+     * @author ahmedbilal
+     * 
+     * Return username of a user whose full name is given as argument
+     * 
+     * @param fullname Full Name of user who username you want to get
+     * 
+     * @return username corresponding to full name or "" if no user
+     *         found with such fullname
+     */
+    static QString usernameFromFullname(QString fullname);
     /**
      * @param maxCount the maximum number of users to return
      * @return all users of the system.
diff --git a/src/lib/util/kuser_unix.cpp b/src/lib/util/kuser_unix.cpp
--- a/src/lib/util/kuser_unix.cpp
+++ b/src/lib/util/kuser_unix.cpp
@@ -302,6 +302,20 @@
     return d->properties.value(which);
 }
 
+QString KUser::usernameFromFullname(QString fullname)
+{
+    QStringList all_users = KUser::allUserNames();
+    QStringListIterator all_users_iterator(all_users);
+    while (all_users_iterator.hasNext())
+    {
+        KUser user(all_users_iterator.next());
+        QString user_fullname = user.property(KUser::FullName).toString();
+        if (fullname == user_fullname)
+            return user.loginName();
+    }
+    return QString();
+}
+
 QList<KUser> KUser::allUsers(uint maxCount)
 {
     QList<KUser> result;