OnItemRenaming

public void OnItemRenaming(object sender, EventArgs args)

    {

      Item item = Event.ExtractParameter(args, 0) as Item;

      if (item == null)

      {

        return;

      }

      Helpers helpers = new Helpers();

      Site site = helpers.FindSiteFromItemPath(item.Paths.FullPath);

      string contextPath = site?.Properties[ContextPathAttribute];

      if (string.IsNullOrEmpty(contextPath))

        return;

      int macroPos = contextPath.IndexOf(ContextMacro, StringComparison.Ordinal);

      if (macroPos > -1)

      {

        var rootDataFolderPath = contextPath.Substring(0, macroPos - 1);

        Item datasourceFolder = item.Database.GetItem(rootDataFolderPath);

        if (datasourceFolder == null)

          return;

        if (datasourceFolder.GetChildren().Any())

        {

          string oldName = HttpContext.Current.Items[ItemNamePersistenceKey]?.ToString() ?? string.Empty;

          Item childItemWithSameName = datasourceFolder.Axes.GetDescendants().FirstOrDefault(x => x.Name == oldName);

          if (childItemWithSameName != null)

          {

            using (new SecurityDisabler())

            {

              childItemWithSameName.Editing.BeginEdit();

              childItemWithSameName.Name = item.Name;

              childItemWithSameName.Editing.EndEdit();

            }

            publish renamed item(might take this out)

            Sitecore.Publishing.PublishOptions publishOptions =

            new Sitecore.Publishing.PublishOptions(item.Database,

                                           Database.GetDatabase("web"),

                                           Sitecore.Publishing.PublishMode.SingleItem,

                                           item.Language,

                                           System.DateTime.Now);  // Create a publisher with the publishoptions

            Sitecore.Publishing.Publisher publisher = new Sitecore.Publishing.Publisher(publishOptions);

            publisher.Options.RootItem = item;

            // Publish children as well?

            publisher.Options.Deep = true;

            publisher.Publish();

          }

        }

      }

    }